Strain G M, Claxton M S, Prescott-Mathews J S, LaPhand D J
Department of Veterinary Physiology, Pharmacology and Toxicology, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803-8420.
Can J Vet Res. 1991 Jan;55(1):1-4.
Electroretinogram (ERG) and visual-evoked potential (VEP) recordings were taken from ten Suffolk-cross sheep. Stimuli for VEP were 1.5 flashes of white light/s; ERG stimuli were single flashes. The ERG measurements of the a and b wave latencies and a-to-b amplitude were measured between the lower eyelid and the vertex, with ground on the nuchal crest. The VEP after monocular stimulation were measured between the nuchal crest and the interorbital line, with ground on the vertex. Measurements consisted of the latencies to seven alternating positive and negative peaks P1, N1, P2, N2, P3, N3 and P4, and six amplitudes, P1-N1, N1-P2, P2-N2, N2-P3, P3-N3 and N3-P4. Average latencies for the a and b waves were 13.6 and 28.2 ms; the mean ab amplitude was 131.68 microV. Average latencies for the seven VEP peaks were 35.0, 43.1, 52.8, 64.1, 74.5, 90.4 and 112.2 ms. Mean amplitudes ranged from 3.90 to 8.29 microV.
对十只萨福克杂交绵羊进行了视网膜电图（ERG）和视觉诱发电位（VEP）记录。VEP的刺激为每秒1.5次白光闪烁；ERG刺激为单次闪光。ERG的a波和b波潜伏期以及a波至b波振幅的测量是在下眼睑和头顶之间进行的，接地电极置于颈嵴。单眼刺激后的VEP测量是在颈嵴和眶间线之间进行的，接地电极置于头顶。测量包括七个交替的正负峰P1、N1、P2、N2、P3、N3和P4的潜伏期，以及六个振幅，即P1 - N1、N1 - P2、P2 - N2、N2 - P3、P3 - N3和N3 - P4。a波和b波的平均潜伏期分别为13.6毫秒和28.2毫秒；ab平均振幅为131.68微伏。七个VEP峰的平均潜伏期分别为35.0、43.1、52.8、64.1、74.5、90.4和112.2毫秒。平均振幅范围为3.90至8.29微伏。
