Strain G M, Taylor D S, Graham M C, Kamerling S G
Department of Veterinary Physiology, Pharmacology and Toxicology, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803-8420.
Am J Vet Res. 1988 Nov;49(11):1869-72.
Cortical somatosensory-evoked potentials (SEP) were recorded from thoracic and pelvic limbs in 15 horses (13 Thoroughbreds and 2 Quarter Horses). Ulnar nerve SEP were evoked by electrical stimulation of the lateral palmar branch of the ulnar nerve at the level of the metacarpophalangeal joint. Recordings were taken between electrodes at 2 cm lateral to the vertex (contralateral to the stimulated limb) and the midpoint of the interorbital line. Four peaks were found in all recordings: N1, P1, N2, and P2. Latencies to the peaks were 39.0 +/- 2.7, 45.5 +/- 5.3, 50.4 +/- 5.2, and 62.3 +/- 3.7 ms (mean +/- SD), respectively. Tibial nerve SEP were evoked by stimulation of the lateral plantar nerve branch of the tibial nerve at the level of the metatarsophalangeal joint. Recordings were taken between electrodes at the vertex (contralateral to the stimulated limb) and the midpoint of the interorbital line. Four peaks were also found in all tibial nerve SEP recordings: N1, P1, N2, and P2. Latencies to the peaks were 64.6 +/- 11.8, 84.5 +/- 9.7, 121.2 +/- 11.6, and 134.0 +/- 11.1 ms, respectively. Amplitude variability was high for the ulnar nerve and the tibial nerve SEP. There was no effect of sex seen on peak latency or amplitude, and peak latencies were not affected by body length.
在15匹马（13匹纯种马和2匹夸特马）身上记录了胸肢和盆腔肢的皮质体感诱发电位（SEP）。通过在掌指关节水平对尺神经的外侧掌支进行电刺激来诱发尺神经SEP。在头顶外侧2厘米处（与受刺激肢体对侧）和眶间线中点之间的电极之间进行记录。在所有记录中发现了四个波峰：N1、P1、N2和P2。波峰潜伏期分别为39.0±2.7、45.5±5.3、50.4±5.2和62.3±3.7毫秒（平均值±标准差）。通过在跖趾关节水平对胫神经的外侧足底神经分支进行刺激来诱发胫神经SEP。在头顶（与受刺激肢体对侧）和眶间线中点之间的电极之间进行记录。在所有胫神经SEP记录中也发现了四个波峰：N1、P1、N2和P2。波峰潜伏期分别为64.6±11.8、84.5±9.7、121.2±11.6和134.0±11.1毫秒。尺神经和胫神经SEP的振幅变异性较高。性别对波峰潜伏期或振幅没有影响，波峰潜伏期不受体长影响。
