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Gap Junction Contributions to the Goldfish Electroretinogram at the Photopic Illumination Level
Doh-YeonKim, Chang-SubJung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.3 11 219-224 (6 pages)
ERG b-wave. Many types of retinal neurons are connected to similar and different neighboring neurons through gap junctions. The photopic (cone-dominated) ERG, stimulated by a small light beam, was recorded from goldfish (Carassius auratus) using a corneal electrode. Data were obtained before and after intravitreal injection of agents into the eye under a photopic illumination level. Several agents were used to affect gap junctions, such as dopamine D1 and D2 receptor agonists and antagonists, a... -
Normal clinical electroretinography parameters for poodle, Labrador retriever, Thai ridgeback, and Thai Bangkaew
Metita Sussadee, Janjira Phavaphutanon, Kornchai Kornkaewrat, Aree Thayananuphat 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 1호 9 67-74 (8 pages)
of the photopic 30 Hz flicker response with 3 cd.s/m (p = 0.610). Out of the four breeds, Thai Bangkaew had the longest implicit time (p ＜ 0.001) of scotopic low intensity responses, b-wave of scotopic standard intensity responses (3 cd.s/m ), a-wave of the higher intensity response (10 cd.s/m ), and a-wave of the photopic single flash response (3 cd.s/m ). For the b/a ratio, only the ratio of the Cone response was significantly different among the... -
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)
Electroretinography (ERG) is a well-established diagnostic procedure for objectively evaluating retinal function. In this study, ERG in beagle dogs, which are a popular experimental animal, was performed to determine the normal range of ERG variables and assess differences between the left and right eyes. ERG findings including rod, combined rod-cone, single-flash cone, and 30-Hz flicker responses were recorded with an LED-electrode in 43 sedated beagle dogs. The subjects were divided into young... -
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)
Electroretinography (ERG) is a reliable diagnostic tool for the diagnosis of retinal disease. It measures electric potentials occurring in the retina in response to light stimulation. In this study, we examined the normal electroretinogram using the Handheld Multispecies ERG (HMsERG) in Shih Tzu dogs. ERG recordings were performed in twelve eyes of six healthy Shih Tzu dogs. Dogs were anesthetized with a combination of medetomidine and ketamine. Proparacaine eye drops were also applied as a... -
The determination of dark adaptation time using electroretinography in conscious Miniature Schnauzer dogs
Hyung-Ah Yu, Man-Bok Jeong, Shin-Ae Park, Won-Tae Kim, Se-Eun Kim, Je-Min Chae, Na-Young Yi, Kang-Moon Seo* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 14 409-414 (6 pages)
The optimal dark adaptation time of electroretinograms (ERG's) performed on conscious dogs were determined using a commercially available ERG unit with a contact lens electrode and a built-in light source (LED-electrode). The ERG recordings were performed on nine healthy Miniature Schnauzer dogs. The bilateral ERG's at seven different dark adaptation times at an intensity of 2.5 cdㆍs/m² was performed. Signal averaging (4 flashes of light stimuli) was adopted to reduce electrophysiologic... -
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... -
The Role of the Pattern Edge in Goldfish Visual Motion Detection
Sun-HeeKim, Chang-SubJung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.6 10 413-417 (5 pages)
objects, we defined four questions to answer. Is the focus point in visual motion detection of a moving object: (1) the body or the edge of the object, (2) the leading edge or trailing edge of the object, (3) different in scotopic, mesopic and photopic luminance levels, or (4) different for colored objects? We measured the Optomotor Response (OMR) and Edge Triggering Response (ETR) of goldfish. We used a square and sine wave patterns with black and red stripes and a square wave pattern with... -
20대 성인 남녀의 대비감도 비교
최순령, 한광래, 심현석, Choi. Soon-Lyoung, Han. Kwang-Lae, Shim. Hyun-Suk 한국안광학회 한국안광학회지 6 Pages
한국안광학회 한국안광학회지 2014, Vol.19 No.1 87-92 (6 pages)
목적: 20대 성인 남녀의 단안과 양안 대비감도를 공간주파수 3.0, 6.0, 12.0, 18.0 cpd를 이용하여 측정하고 단안과 양안의 차이와 남녀간의 차이 등을 비교해 보고자 하였다. 방법: 안경광학과 재학생 99명(남 51명, 여48명)을 대상으로 Topcon CV-3000 Phoroptor를 이용하여 완전교정 후 명소시(100 $cd/m^2$)상태에서 CSV-1000E(VectorVision, Ohio, USA)를 이용하여 2.5 m 거리에서 대비감도를 측정하였다. 결과: 명소시 2.5 m에서 검사한 전체 표본의 평균 대비감도는 3, 6, 12, 18 cpd에서 각각 우안은 52.54, 80.40, 36.79,... -
Change of Spherical Aberration with Aspheric Soft Contact Lens Wear
김정미, 문미영, 김영철, 이군자, Kim. Jeong Mee, Mun. Mi-Young, Kim. Young Chul, Lee. Koon-Ja 한국안광학회 한국안광학회지 8 Pages
한국안광학회 한국안광학회지 2012, Vol.17 No.4 365-372 (8 pages)
4 mm의 동공크기를 기준으로 측정하였고, 구면수차 변화량은 착용한 비구면 렌즈의 약도, 중도, 고도의 도수에 따라 비교, 분석하였다. 밝은 조명(photopic)과 어두운(mesopic) 조명상태에서 대비도를 가지는 시력표(100%와 20%)를 이용하여 시력 검사를 하였고 OPTEC 6500 Vision Tester$^{(R)}$(Stereo Optical Co., Inc., Chicago, USA)를 사용하여 밝은 조명(photopic)과 어두운(mesopic)조명 상태의 대비감도를 각각 측정하였다. 모든 측정은 산동 시키지 않은 상태에서 단안으로 시행하였다. 결과: SDD 비구면 렌즈를 착용한 경우... -
콘택트렌즈와 안경 착용자의 대비감도 비교
김재민, 이민아, Kim. Jai-Min, Lee. Min-Ah 한국안광학회 한국안광학회지 7 Pages
한국안광학회 한국안광학회지 2007, Vol.12 No.4 119-125 (7 pages)
대비감도는 EyeView$^{(R)}$ Functional Vision Analysis software가 포함된 Optec 6500 Vision Tester$^{(R)}$ (Stereo Optical. USA)을 이용하여 Photopic (85cd)과 mesopic (3cd) 상태에서 대비 감도를 조사하여 비교하였다. 안경장용자는 정시안과 비교하여 모든 조건에서 대비감도에서 의의 있는 차이가 없었다. 소프트 콘택트렌즈 착용자는 정시안에 비해 1.5와 12cpd에서 통계적으로 낮은 대비감도를 보였다. 본 연구의 콘택트렌즈 착용자에서 대비감도가 낮게 나온 것은 콘택트렌즈 착용자의 각막 병리로 진행하기 전단계에서...
