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Electroretinography recordings using a light emitting diode active corneal electrode in healthy beagle dogs
Yoshiki Itoh, Seiya Maehara, Norihiko Itoh*, Kazuto Yamashita, Yasuharu Izumisawa 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 1호 11 77-84 (8 pages)
an LED-electrode in 43 sedated beagle dogs. The subjects were divided into young (＜ 1 year old), adult (1∼5 years old), and senile animals (≥ 6 years old). Normal ERG ranges were obtained. Significant differences in b-wave amplitude along with b/a ratio of the combined rod-cone response were found between the young and adult animals as well as young and senile dogs. No significant differences were observed between the left and right eyes. ERG variables in beagle dogs differed by age due to... -
Interconnected meso/microporous carbon derived from pumpkin seeds as an efficient electrode material for supercapacitors
Mayakrishnan Gopiraman, Somasundaram Saravanamoorthy, Seung-Hyun Kim, Ill-Min Chung 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 10 73-81 (9 pages)
electrode materials. The resultant porous carbons (PS-600, PS-700, PS-800, and PS-900) were utilized as electrode material for supercapacitors. To our delight, the PS-900 demonstrated a maximum specific capacitance (Cs) of 303 F g?1 in 1.0 M H2SO4 at a scan rate of 5 mV. The electrochemical impedance spectra confirmed the poor electrical resistance of the electrode materials. Moreover, the stability of the PS-900 was found to be excellent (no significant change in the Cs even after 6000 cycles). -
Electrochemical determination of chloramphenicol using a glassy carbon electrode modified with dendrite-like Fe₃O₄ nanoparticles
Krishnan Giribabu, Sung-Chan Jang, Yuvaraj Haldorai, Muruganantham Rethinasabapathy, Seo Yeong Oh, Arunkumar Rengaraj, Young-Kyu Han 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 6 38-47 (10 pages)
a glassy carbon electrode (GCE). The Fe3O4/GCE was utilized for sensing chloramphenicol (CAP) by cyclic voltammetry and square wave voltammetry. A reduction peak of CAP at the Fe3O4/GCE was observed at 0.62 V, whereas the uncoated GCE exhibited a very small response compared to that of the Fe3O4/GCE. The electrocatalytic ability of Fe3O4 was mainly attributed to the formation of Fe(VI) during the anodic scan, and its reduction to Fe(III) on the cathodic scan facilitated the sensing of CAP. The... -
Biologically activated graphite fiber electrode for autotrophic acetate production from CO2 in a bioelectrochemical system
Chae Ho Im, Young Eun Song, Byong-Hun Jeon, Jung Rae Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 12 76-80 (5 pages)
a carbon electrode by accepting electrons supplied externally from a power supply [2-4]. Through this process, oxidized chemical molecules, such as CO2, can be converted to more reduced products, such as acetate and ethanol [4,5]. Since the first report of MESs with S. ovata [3,4], performance has been improved by efforts to optimize the reactor design, regulate the applied potential, and improve the bacterial enrichment method [6-8]. On the other hand, the interaction between microorganism and... -
Rate-capability response of graphite anode materials in advanced energy storage systems: a structural comparison
Umer Farooq, Chil-Hoon Doh, Syed Atif Pervez, Doo-Hun Kim, Sang-Hoon Lee, Mohsin Saleem, Seong-Ju Sim, Jeong-Hee Choi 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 6 39-44 (6 pages)
as negative electrode materials in battery operation. The results demonstrated that a material having a higher crystalline order exhibits enhanced electrochemical properties when evaluated in terms of rate-capability performance. All these materials were investigated at high C-rates ranging from 0.1C up to 10C. Such improved response was attributed to the crystalline morphology providing short layers, which facilitate rapid Li+ ions diffusivity and electron transport during the course of battery... -
Conducting and interface characterization of carbonate-type organic electrolytes containing EMImBF4 as an additive against activated carbon electrode
Mingyeong Kim, Kyungmin Kim and Seok Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 8 51-56 (6 pages)
Carbonate-type organic electrolytes were prepared using propylene carbonate (PC) and dimethyl carbonate (DMC) as a solvent, quaternary ammonium salts, and by adding different contents of 1-ethyl-3-methyl imidazolium tetrafluoroborate (EMImBF4). Cyclic voltammetry and linear sweep voltammetry were performed to analyze conducting behaviors. The surface characterizations were analyzed by scanning electron microscopy method and X-ray photoelectron spectroscopy. From the experimental results,... -
Influence of ionic liquid additives on the conducting and interfacial properties of organic solvent-based electrolytes against an activated carbon electrode
Kyungmin Kim, Yongju Jung, Seok Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 5 187-191 (5 pages)
a carbon electrode. We used the mixture of ethylene carbonate/dimethoxyethane (1:1) as an organic solvent electrolyte and tetraethylammonium tetrafluoroborate (TEABF4) as a common salt. Using the PYR14BF ionic liquid as additive produced higher ionic conductivity in the electrolyte and lower interface resistance between carbon and electrolyte, resulting in improved capacitance. The chemical and electrochemical stability of the electrolyte was measured by ionic conductivity meter and linear sweep... -
Pathology of non-thermal irreversible electroporation (N-TIRE)-induced ablation of the canine brain
John H. Rossmeisl Jr., Paulo A. Garcia, John L. Roberston, Thomas L. Ellis, Rafael V. Davalos 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 4호 9 433-440 (8 pages)
This study describes the neuropathologic features of normal canine brain ablated with non-thermal irreversible electroporation (N-TIRE). The parietal cerebral cortices of four dogs were treated with N-TIRE using a dose-escalation protocol with an additional dog receiving sham treatment. Animals were allowed to recover following N-TIRE ablation and the effects of treatment were monitored with clinical and magnetic resonance imaging examinations. Brains were subjected to histopathologic and... -
Chemopreventive and metabolic effects of inulin on colon cancer development
Emília Hijová, Viktória Szabadosova, Jana Štofilová, Gabriela Hrčková 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 4호 3 387-393 (7 pages)
Prebiotics modulate microbial composition and ensure a healthy gastrointestinal tract environment that can prevent colon cancer development. These natural dietary compounds are therefore potential chemopreventive agents. Thirty Sprague-Dawley rats (4 months old) were experimentally treated with procarcinogen dimethylhydrazine to induce colon cancer development. The rats were randomly assigned to three groups: a control group (CG), a group treated with dimethylhydrazine (DMH), and a group given... -
Functional recovery and neural differentiation after transplantation of allogenic adipose-derived stem cells in a canine model of acute spinal cord injury
Hak-Hyun Ryu, Ji-Hey Lim, Ye-Eun Byeon, Jeong-Ran Park, Min-Soo Seo, Young-Won Lee, Wan Hee Kim, Kyung-Sun Kang*, Oh-Kyeong Kweo 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 4호 1 273-284 (12 pages)
In this study, we evaluated if the implantation of allogenic adipose-derived stem cells (ASCs) improved neurological function in a canine spinal cord injury model. Eleven adult dogs were assigned to three groups according to treatment after spinal cord injury by epidural balloon compression: C group (no ASCs treatment as control), V group (vehicle treatment with PBS), and ASC group (ASCs treatment). ASCs or vehicle were injected directly into the injured site 1 week after spinal cord injury.... -
The normal electroretinogram in adult healthy Shih Tzu dogs using the HMsERG
June-sub Lee, Kyung-hee Kim, Ha-young Jang, Bora Lee, Joon Young Kim, Soon-wuk Jeong* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 3호 9 233-238 (6 pages)
of the rod, standard rod and cone (Std R&C), high- intensity rod and cone (Hi-int R&C), and cone systems, and responses of the cones and inner retina by flicker light stimulation (cone flicker). Results showed that mean the amplitudes of a-waves of Std R&C, Hi-int R&C, and the cone responses were 141.25 mV, 173.00 mV, and 12.92 mV, respectively. The b-waves of the rod responses ranged from 141.58 to 155.25 mV; the Std R&C was 314.75 mV, the Hi-int R&C was 329.42 mV, the... -
In vitro and in vivo gene therapy with CMV vector-mediated presumed dog β-nerve growth factor in pyridoxine-induced neuropathy dogs
Jin-Young Chung, Jung-Hoon Choi, Il-Seob Shin, Eun-Wha Choi, Cheol-Yong Hwang, Sang-Koo Lee, Hwa-Young Youn* 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 4호 5 367-374 (8 pages)
Due to the therapeutic potential of gene therapy for neuronal injury, many studies of neurotrophic factors, vectors, and animal models have been performed. The presumed dog β-nerve growth factor (pdβ-NGF) was generated and cloned and its expression was confirmed in CHO cells. The recombinant pdβ-NGF protein reacted with a human β-NGF antibody and showed bioactivity in PC12 cells. The pdβb-NGF was shown to have similar bioactivity to the dog β-NGF. The recombinant pdβ-NGF plasmid was... -
pH-dependent modulation of intracellular free magnesium ions with ion- selective electrodes in papillary muscle of guinea pig
Shang-Jin Kim, In-Gook Cho, Hyung-Sub Kang, Jin-Shang Kim 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2006, 제 7권 제 1호 5 31-36 (6 pages)
A change in pH can alter the intracellular concentration of electrolytes such as intracellular Ca2+ and Na+ ([Na+]i) that are important for the cardiac function.For the determination of the role of pH in the cardiac magnesium homeostasis, the intracellular Mg 2+ concentration ([Mg 2+]i), membrane potential and contraction in the papillary muscle of guinea pigs using ion-selective electrodes changing extracellular pH ([pH]o)or intracellular pH ([pH ]i )were measured in this study. A high... -
Characterization of Brachyspira hyodysenteriae isolates from Korea
Tae Jung Kim, Suk Chan Jung, Jae Il Lee 대한수의학회 Journal of Veterinary Science 5 Pages
대한수의학회 Journal of Veterinary Science 2005, 제 6권 제 4호 12 335-339 (5 pages)
Using multilocus enzyme electrophoresis (MLEE) with 15 enzymes and 5 buffer systems, the Korean and non-Korean isolates were divided into 22 electrophoretic types (ETs) and 5 divisions (A, B, C, D and E). Division A corresponded to B. hyodysenteriae, B to B. innocens, C to B. intermedia, D to B. murdochii and E to B. pilosicoli. The 10 Korean isolates of B. hyodysenteriae were relatively diverse, being divided into 9 ETs within MLEE division A. They were all distinct from the non-Korean strains. -
Oocyte maturation under a biophoton generator improves preimplantation development of pig embryos derived by parthenogenesis and somatic cell nuclear transfer
Joohyeong Lee , Hyeji Shin , Wonyou Lee , Seung Tae Lee , Geun-shik Lee , Sang-hwan Hyun , Eunsong Lee 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 7 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2017, 제 57권 제 2호 3 89-95 (7 pages)
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Changes in bispectral index score and cardiorespiratory function under constant rate infusion with alfaxalone in dogs
Sungho Yun , Young-sam Kwon 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 5 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2016, 제 56권 제 3호 1 133-137 (5 pages)
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Predicting Attention and Memory Ability based on the Combination of EEG and HRV data in Children
Hyeong Seok Jeon, Junhee Lee, June Lee, You Jin Hwang, Siyoung Lee, Hee Yang, Jung Han Yoon, Jun Soo Kwon, Jung Ho Won, Jun Dong Cho, Ki Won Lee 한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 8 Pages
한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 2019, 제 9권 제 3호 1 105-112 (8 pages)
Good performance is important element not only in workplace but also in daily activities. Performance of the human depends on the mental capacity and mental workload. Especially, children in concrete operational stage is critical for further learning ability that they develop their ability to distinguish between quality and quantity. However, the reason that mental workload is difficult to quantify through physiological measures, makes it more complicated to demonstrate the mental workload. When... -
The efficacy of combination treatment of gabapentin and electro-acupuncture on paclitaxel-induced neuropathic pain
MinJoonKim, JiHwanLee, JoUngJang, FuShiQuan, SunKwangKim, WoojinKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.6 11 657-666 (10 pages)
Paclitaxel, a chemotherapeutic drug, induces severe peripheral neuropathy. Gabapentin (GBT) is a first line agent used to treat neuropathic pain, and its effect is mediated by spinal noradrenergic and muscarinic cholinergic receptors. Electro-acupuncture (EA) is used for treating various types of pain via its action through spinal opioidergic and noradrenergic receptors. Here, we investigated whether combined treatment of these two agents could exert a synergistic effect on paclitaxel-induced... -
The advantage of topographic prominence-adopted filter for the detection of short-latency spikes of retinal ganglion cells
JungryulAhn, Myoung-HwanChoi, KwangsooKim, SolomonS.Senok, Dong-ilDanCho, Kyo-inKoo, YongsookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.5 10 555-563 (9 pages)
Electrical stimulation through retinal prosthesis elicits both short and long-latency retinal ganglion cell (RGC) spikes. Because the short-latency RGC spike is usually obscured by electrical stimulus artifact, it is very important to isolate spike from stimulus artifact. Previously, we showed that topographic prominence (TP) discriminator based algorithm is valid and useful for artifact subtraction. In this study, we compared the performance of forward backward (FB) filter only vs. TP-adopted... -
Peroxisome proliferator-activated receptor γ is essential for secretion of ANP induced by prostaglandin D2 in the beating rat atrium
YingZhang, XiangLi, Li-PingLiu, LanHong, XiaLiu, BoZhang, Cheng-ZheWu, XunCui 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.3 3 293-300 (8 pages)
Prostaglandin D2 (PGD2) may act against myocardial ischemia–reperfusion (I/R) injury and play an anti-inflammatory role in the heart. Although the effect of PGD2 in regulation of ANP secretion of the atrium was reported, the mechanisms involved are not clearly identified. The aim of the present study was to investigate whether PGD2 can regulate ANP secretion in the isolated perfused beating rat atrium, and its underlying mechanisms. PGD2 (0.1 to 10 μM) significantly increased atrial ANP... -
Participation of central GABAA receptors in the trigeminal processing of mechanical allodynia in rats
MinJiKim, YoungHongPark, KuiYeYang, JinSookJu, YongChulBae, SeongKyuHan, DongKukAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.1 8 65-74 (10 pages)
Here we investigated the central processing mechanisms of mechanical allodynia and found a direct excitatory link with low-threshold input to nociceptive neurons. Experiments were performed on male Sprague-Dawley rats weighing 230-280 g. Subcutaneous injection of interleukin 1 beta (IL-1β) (1 ng/10 μL) was used to produce mechanical allodynia and thermal hyperalgesia. Intracisternal administration of bicuculline, a gamma aminobutyric acid A (GABAA) receptor antagonist, produced mechanical... -
Effect of Stimulus Waveform of Biphasic Current Pulse on Retinal Ganglion Cell Responses in Retinal Degeneration (rd1) mice
KunNoAhn, JeongYeolAhn, Jae-hyungKim, KyoungrokCho, Kyo-inKoo, SolomonS.Senok, YongSookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.2 12 167-175 (9 pages)
A retinal prosthesis is being developed for the restoration of vision in patients with retinitis pigmentosa (RP) and age-related macular degeneration (AMD). Determining optimal electrical stimulation parameters for the prosthesis is one of the most important elements for the development of a viable retinal prosthesis. Here, we investigated the effects of different charge-balanced biphasic pulses with regard to their effectiveness in evoking retinal ganglion cell (RGC) responses. Retinal... -
Neuronal Responses in the Globus Pallidus during Subthalamic Nucleus Electrical Stimulation in Normal and Parkinson's Disease Model Rats
SangBaekRyu, EunKyungBae, JinhyungKim, , YongSupHwang, , ChangkyunIm, JinWooChang, , Hyung-CheulShin, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.4 7 299-306 (8 pages)
Deep brain stimulation (DBS) of the subthalamic nucleus (STN) has been widely used as a treatment for the movement disturbances caused by Parkinson's disease (PD). Despite successful application of DBS, its mechanism of therapeutic effect is not clearly understood. Because PD results from the degeneration of dopamine neurons that affect the basal ganglia (BG) network, investigation of neuronal responses of BG neurons during STN DBS can provide informative insights for the understanding of the... -
Electrophysiological and Histologic Evaluation of the Time Course of Retinal Degeneration in the rd10 Mouse Model of Retinitis Pigmentosa
SeolAJae, KunNoAhn, JiYoungKim, JeHoonSeo, HyongKyuKim, YongSookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.3 8 229-235 (7 pages)
Among several animal models of retinitis pigmentosa (RP), the more recently developed rd10 mouse with later onset and slower rate of retinal degeneration than rd1 mouse is a more suitable model for testing therapeutic modalities. We therefore investigated the time course of retinal degeneration in rd10 mice before adopting this model in our interventional studies. Electroretinogram (ERG) recordings were carried out in postnatal weeks (PW) 3∼5 rd10 (n=23) and wild-type (wt) mice (n=26). We... -
Inhibitory Effects of Ginsenoside Metabolites, Compound K and Protopanaxatriol, on GABAC Receptor-Mediated Ion Currents
Byung-HwanLee, Sung-HeeHwang, Sun-HyeChoi, Hyeon-JoongKim, Joon-HeeLee, Sang-MokLee, YunGyongAhn, Seung-YeolNah 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.2 3 127-132 (6 pages)
electrode voltage clamp technique. In oocytes expressing GABAC receptor cRNA, we found that CK or M4 alone had no effect in oocytes. However, co-application of either CK or M4 with GABA inhibited the GABA-induced inward peak current (IGABA). Interestingly, pre-application of M4 inhibited IGABA more potently than CK in a dose- dependent and reversible manner. The half-inhibitory concentration (IC50) values of CK and M4 were 52.1±2.3 and 45.7±3.9 ՌM, respectively. Inhibition of IGABA by CK... -
Spontaneous Oscillatory Rhythm in Retinal Activities of Two Retinal Degeneration (rd1 and rd10) Mice
YongSookGoo, KunNoAhn, YeongJunSong, SuHeokAhn, SeungKeeHan, SangBaekRyu, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.6 13 415-422 (8 pages)
Previously, we reported that besides retinal ganglion cell (RGC) spike, there is ∼10 Hz oscillatory rhythmic activity in local field potential (LFP) in retinal degeneration model, rd1 mice. The more recently identified rd10 mice have a later onset and slower rate of photoreceptor degeneration than the rd1 mice, providing more therapeutic potential. In this study, before adapting rd10 mice as a new animal model for our electrical stimulation study, we investigated electrical characteristics of... -
Glycine- and GABA-mimetic Actions of Shilajit on the Substantia Gelatinosa Neurons of the Trigeminal Subnucleus Caudalis in Mice
HuaYin, EunJuYang, SooJoungPark, SeongKyuHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.5 6 285-290 (6 pages)
Shilajit, a medicine herb commonly used in Ayurveda, has been reported to contain at least 85 minerals in ionic form that act on a variety of chemical, biological, and physical stressors. The substantia gelatinosa (SG) neurons of the trigeminal subnucleus caudalis (Vc) are involved in orofacial nociceptive processing. Shilajit has been reported to be an injury and muscular pain reliever but there have been few functional studies of the effect of Shilajit on the SG neurons of the Vc. Therefore,... -
A Computational Model of Cytosolic and Mitochondrial [Ca2＋] in Paced Rat Ventricular Myocytes
JaeBoumYoum, SeongWooChoi, ChangHanJang, HyoungKyuKim, ChaeHunLeem, NariKim, JinHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 23 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.4 5 217-239 (23 pages)
We carried out a series of experiment demonstrating the role of mitochondria in the cytosolic and mitochondrial Ca2＋ transients and compared the results with those from computer simulation. In rat ventricular myocytes, increasing the rate of stimulation (1∼3 Hz) made both the diastolic and systolic [Ca2＋] bigger in mitochondria as well as in cytosol. As L-type Ca2＋ channel has key influence on the amplitude of Ca2＋-induced Ca2＋ release, the relation between stimulus frequency and the... -
Effects of Serotonin on the Induction of Long-term Depression in the Rat Visual Cortex
Hyun-JongJang, Kwang-HyunCho, , Sung-WonPark, Myung-JunKim, ShinHeeYoon, Duck-JooRhie 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.5 14 337-343 (7 pages)
Long-term potentiation (LTP) and long-term depression (LTD) have both been studied as mechanisms of ocular dominance plasticity in the rat visual cortex. In a previous study, we suggested that a developmental increase in serotonin [5-hydroxytryptamine (5-HT)] might be involved in the decline of LTP, since 5-HT inhibited its induction. In the present study, to further understand the role of 5-HT in a developmental decrease in plasticity, we investigated the effect of 5-HT on the induction of LTD... -
Effects of Isoflurane Anesthesia on Post-Anesthetic Sleep-Wake Architectures in Rats
Hwan-SooJang, Ji-YoungJung, Kwang-HoJang, Maan-GeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.5 7 291-297 (7 pages)
The sleep homeostatic response significantly affects the state of anesthesia. In addition, sleep recovery may occur during anesthesia, either via a natural sleep-like process to occur or via a direct restorative effect. Little is known about the effects of isoflurane anesthesia on sleep homeostasis. We investigated whether 1) isoflurane anesthesia could provide a sleep-like process, and 2) the depth of anesthesia could differently affect the post-anesthesia sleep response. Nine rats were treated... -
Modulation of Presynaptic GABA Release by Oxidative Stress in Mechanically-isolated Rat Cerebral Cortical Neurons
Eu-TeumHahm, Jung-WooSeo, JinyoungHur, Young-WukCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.3 2 127-132 (6 pages)
Reactive oxygen species (ROS), which include hydrogen peroxide (H2O2), the superoxide anion (O2−·), and the hydroxyl radical (OH·), are generated as by-products of oxidative metabolism in cells. The cerebral cortex has been found to be particularly vulnerable to production of ROS associated with conditions such as ischemia-reperfusion, Parkinson's disease, and aging. To investigate the effect of ROS on inhibitory GABAergic synaptic transmission, we examined the electrophysiological... -
Effects of Saccharin Intake on Hippocampal and Cortical Plasticity in Juvenile and Adolescent Rats
Jong-SilPark, SangBaeYoo, JinYoungKim, SungJoongLee, Seog-BaeOh, Joong-SooKim, Jong-HoLee, KyungpyoPark, JeongWonJahng, Se-YoungChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.2 8 113-118 (6 pages)
The sensory system is developed and optimized by experiences given in the early phase of life in association with other regions of the nervous system. To date, many studies have revealed that deprivation of specific sensory experiences can modify the structure and function of the central nervous system; however, the effects of sensory overload remains unclear. Here we studied the effect of overloading the taste sense in the early period of life on the synaptic plasticity of rat hippocampus and... -
Nitric Oxide Modulation of GABAergic Synaptic Transmission in Mechanically Isolated Rat Auditory Cortical Neurons
Jong-JuLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.6 9 461-467 (7 pages)
The auditory cortex (A1) encodes the acquired significance of sound for the perception and interpretation of sound. Nitric oxide (NO) is a gas molecule with free radical properties that functions as a transmitter molecule and can alter neural activity without direct synaptic connections. We used whole-cell recordings under voltage clamp to investigate the effect of NO on spontaneous GABAergic synaptic transmission in mechanically isolated rat auditory cortical neurons preserving functional... -
Electrically-evoked Neural Activities of rd1 Mice Retinal Ganglion Cells by Repetitive Pulse Stimulation
SangBaekRyu, JangHeeYe, JongSeungLee, YongSookGoo, ChiHyunKim, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.6 6 443-448 (6 pages)
We studied RGC responses to repetitive electrical stimulation pulses to develop a stimulation strategy using stimulation pulse frequency modulation. Retinal patches of photoreceptor-degenerated retinas from rd1 mice were attached to a planar multi-electrode array (MEA) and RGC spike trains responding to electrical stimulation pulse trains with various pulse frequencies were observed. RGC responses were strongly dependent on inter-pulse interval when it was varied from 500 to 10 ms. Although the... -
Provinol Inhibits Catecholamine Secretion from the Rat Adrenal Medulla
Jung-HeeLee, Yu-SeungSeo, Dong-YoonLim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.3 14 229-239 (11 pages)
The aim of the present study was to examine the effect of provinol, which is a mixture of polyphenolic compounds from red wine, on the secretion of catecholamines (CA) from isolated perfused rat adrenal medulla, and to elucidate its mechanism of action. Provinol (0.3∼3Ռg/ml) perfused into an adrenal vein for 90 min dose- and time-dependently inhibited the CA secretory responses evoked by ACh (5.32 mM), high K＋ (a direct membrane-depolarizer, 56 mM), DMPP (a selective neuronal nicotinic... -
Accurate Representation of Light-intensity Information by the Neural Activities of Independently Firing Retinal Ganglion Cells
SangBaekRyu, JangHeeYe, ChiHyunKim, YongSookGoo, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.3 13 221-227 (7 pages)
For successful restoration of visual function by a visual neural prosthesis such as retinal implant, electrical stimulation should evoke neural responses so that the information on visual input is properly represented. A stimulation strategy, which means a method for generating stimulation waveforms based on visual input, should be developed for this purpose. We proposed to use the decoding of visual input from retinal ganglion cell (RGC) responses for the evaluation of stimulus encoding... -
Role of Dopamine Receptors on Electroencephalographic Changes Produced by Repetitive Apomorphine Treatments in Rats
HwanSooJang, JiYoungKim, SangHeonKim, Maan-GeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.3 2 147-151 (5 pages)
Repeated psychostimulants induce electroencephalographic (EEG) changes, which reflect adaptation of the neural substrate related to dopaminergic pathways. To study the role of dopamine receptors in EEG changes, we examined the effect of apomorphine, the dopamine D1 receptor antagonist, SCH-23390, and the D2 receptor antagonist, haloperidol, on EEG in rats. For single and repeated apomorphine treatment groups, the rats received saline or apomorphine for 4 days followed by a 3-day withdrawal... -
The Effect of Extracellular Glutamate Release on Repetitive Transient Ischemic Injury in Global Ischemia Model
GiJaLee, SeokKeunChoi, YunHyeEo, SungWookKang, SamjinChoi, JeongHoonPark, JiEunLim, KyungWonHong, HyunSeokJin, BermSeokOh, HunKukPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.1 4 23-26 (4 pages)
During operations, neurosurgeons usually perform multiple temporary occlusions of parental artery, possibly resulting in the neuronal damage. It is generally thought that neuronal damage by cerebral ischemia is associated with extracellular concentrations of the excitatory amino acids. In this study, we measured the dynamics of extracellular glutamate release in 11 vessel occlusion (VO) model to compare between single occlusion and repeated transient occlusions within short interval. Changes in... -
Functional Connectivity Map of Retinal Ganglion Cells for Retinal Prosthesis
JangHeeYe, SangBaekRyu, KyungHwanKim, YongSookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.6 4 307-314 (8 pages)
Retinal prostheses are being developed to restore vision for the blind with retinal diseases such as retinitis pigmentosa (RP) or age-related macular degeneration (AMD). Among the many issues for prosthesis development, stimulation encoding strategy is one of the most essential electrophysiological issues. The more we understand the retinal circuitry how it encodes and processes visual information, the greater it could help decide stimulation encoding strategy for retinal prosthesis. Therefore,... -
Post-ischemic Time-dependent Activity Changes of Hippocampal CA1 cells of the Mongolian Gerbils
Moo-HoWon, Hyung-CheulShin 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.6 3 249-252 (4 pages)
Changes of single unit activity of CA1 hippocampus region were investigated in anesthetized Mongolian gerbils for six days following transient ischemia. Ischemia was produced immediately before the implantation of micro-wire recording electrodes. In control animals receiving pseudo-ischemic surgery, neither spontaneous neuronal activities (5.70±0.4 Hz) nor the number of recorded neurons per animal changed significantly for six days. Correlative firings among simultaneously recorded neurons... -
Tetanus-induced LTD of Developing MNTB-LSO Synapses in Rat is Dependent on Postsynaptic Ca2+
SeungCheolAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.3 1 79-84 (6 pages)
Because synaptic refinement of medial nucleus of trapezoid body (MNTB) - lateral superior olive (LSO) synapses is most active during the first postnatal week and the long term depression (LTD) has been suggested as one of its mechanisms, LTD of MNTB-LSO synapses was investigated in neonatal rat brain stem slices with the whole cell voltage clamp technique. In Mg2 free condition, tetanus (10 stimuli at 10 Hz for 2 min) in the current clamp mode induced a robust LTD of isolated D,... -
NMDA Receptor-dependent Inhibition of Synaptic Transmission by Acute Ethanol Treatment in Rat Corticostriatal Slices
SeJoonChoi, KiJungKim, HyeongSeokCho, SeongYunKim, Dong-SeokYim, Young-JinCho, SangJuneHahn, Ki-WugSung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.6 2 303-308 (6 pages)
The effects of ethanol on corticostriatal synaptic transmission were examined, using extracellular recording and analysis of population spike amplitudes in rat brain slices, to study how acute ethanol intoxication impairs striatal function. Ethanol caused a decrease in population spike amplitudes in a dose dependent manner (50∼200 mM). Pretreatment with picrotoxin, a γ-amino butyric acid (GABA)A receptor antagonist, increased the population spikes but ethanol (100 mM) was still effective in... -
Dopamine Modulates Corticostriatal Synaptic Transmission through Both D1 and D2 Receptor Subtypes in Rat Brain
HyunHoLee, SeJoonChoi, Ki-JungKim, HyeongSeokCho, SeongYunKim, Ki-WugSung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.5 2 263-268 (6 pages)
Striatum has important roles in motor control, habitual learning and memory. It receives glutamatergic inputs from neocortex and thalamus, and dopaminergic inputs from substantia nigra. We examined effects of dopamine (DA) on the corticostriatal synaptic transmission using in vitro extracellular recording technique in rat brain corticostriatal slices. Synaptic responses were elicited by stimulation of cortical glutamatergic inputs on the corpus callosum and recorded in the dorsal striatum.... -
Peripheral Nerve Injury Alters Excitatory and Inhibitory Synaptic Transmission in Rat Spinal Cord Substantia Gelatinosa
Dong-HoYoun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.3 2 143-148 (6 pages)
In addition, short-term depression, recognized by paired-pulse ratio of excitatory postsynaptic currents, is significantly increased, indicating the increase of glutamate release probability at primary afferent terminals. The peripheral nerve injury also increases the amplitude, but not the frequency, of spontaneous inhibitory postsynaptic currents. These data support the hypothesis that peripheral nerve injury modifies spinal pain conduction and modulation systems to develop neuropathic pain. -
D-Amphetamine Causes Dual Actions on Catecholamine Release from the Rat Adrenal Medulla
Geon-HanLim, Gwang-MoonNa, Seon-YoungMin, Yoo-SeokSeo, Chan-WonPark, Dong-YoonLim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.1 7 45-54 (10 pages)
The present study was designed to examine the effect of d-amphetamine on CA release from the isolated perfused model of the rat adrenal gland, and to establish its mechanism of action. D- amphetamine (10∼100μM), when perfused into an adrenal vein of the rat adrenal gland for 60 min, enhanced the CA secretory responses evoked by ACh (5.32⁓103 M), excess K (5.6⁓102 M, a membrane depolarizer), DMPP (104 M, a selective neuronal nicotinic Nn-receptor agonist)... -
Differential Effects of Typical and Atypical Antipsychotics on MK- 801-induced EEG Changes in Rats
JeeSookKwon, KiMinKim, SuMinChang, Choong-YoungKim, TaiHoChung, Byung-JuChoi, MaanGeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.1 3 17-22 (6 pages)
We examined whether the abnormal EEG state by NMDA receptor blocker MK-801 can be reversed by typical and atypical antipsychotics differentially by comparing their spectral profiles after drug treatment in rats. The spectral profiles produced by typical antipsychotics chlorpromazine (5 mg/kg, i.p.) and haloperidol (0.5 mg/kg, i.p.) were differ from that by atypical antipsychotic clozapine (5 mg/kg, i.p.) in the rats treated with or without MK-801 treatment (0.2 mg/kg, i.p.) which produce... -
Effect of Fluoxetine on the Induction of Long-term Potentiation in Rat Frontal Cortex
Hwang-SooKim, Hyun-SokKim, SangJuneHahn, Myung-JunKim, ShinHeeYoon, Yang-HyeokJo, Myung-SukKim, Duck-JooRhie 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.6 1 295-300 (6 pages)
Serotonin (5-hydroxytroptamine, 5-HT) has been shown to affect the induction of long-term potentiation (LTP) in the cortex such as the hippocampus, the visual cortex and the prefrontal cortex. Fluoxetine, as a selective serotonin reuptake inhibitor, is used in the management of a wide variety of psychological diseases. To study the effect of fluoxetine on the induction of LTP, we recorded the field potential in layer II/III of the frontal cortex from 3-wk-old. LTP was induced in horizontal input... -
Inhibitory Modulation of 5-Hydroxytryptamine on Corticostriatal Synaptic Transmission in Rat Brain Slice
SeJoonChoi, WonSoonChung, Ki-JungKim, Ki-WugSung, 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.6 1 295-301 (7 pages)
Striatum plays a crucial role in the movement control and habitual learning. It receives an information from wide area of cerebral cortex as well as an extensive serotonergic (5-hydroxytryptamine, 5-HT) input from raphe nuclei. In the present study, the effects of 5-HT to modulate synaptic transmission were studied in the rat corticostriatal brain slice using in vitro extracellular recording technique. Synaptic responses were evoked by stimulation of cortical glutamatergic inputs on the corpus...
