Uzuka Y, Saitoh M, Hiramatsu I, Nagata T
Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Yamaguchi University, Japan.
J Vet Med Sci. 1995 Oct;57(5):871-76. doi: 10.1292/jvms.57.871.
Since spinal cord abnormalities are often associated with lesion in the thoracic or lumber vertebrae, examination of Somatosensory evoked potential (SEP) induced by hind limb nerve stimulation will be useful. In the experiment, scalp recorded SEP in dogs by tibial nerve stimulation was studied on the distribution, the change of latency by body size and the influence of experimental compression to the spinal cord. Greatest response was got at Fz, and shorter latencies for SEP recorded on the ipsilateral stimulation side than from the contralateral side. The equation describing the regression line of the latency with the distance to the recording site from stimulating site was Y = 0.072X+13.23 and the regression was statistically significant. In the experimental study of compression to spinal cord, dorsal compression tended to be sensitive compared to the ventral compression. This study suggested that not only increase of latency but also reduction of amplitude could occur as a result of spinal cord disorders.
由于脊髓异常常与胸椎或腰椎病变相关，因此通过后肢神经刺激诱发体感诱发电位（SEP）进行检查将很有用。在实验中，研究了通过刺激犬的胫神经在头皮记录的SEP的分布、潜伏期随体型的变化以及实验性脊髓压迫的影响。在Fz处获得最大反应，同侧刺激侧记录的SEP潜伏期比 contralateral 侧短。描述潜伏期与从刺激部位到记录部位距离的回归线方程为Y = 0.072X + 13.23，且回归具有统计学意义。在脊髓压迫的实验研究中，与腹侧压迫相比，背侧压迫往往更敏感。这项研究表明，脊髓疾病不仅会导致潜伏期延长，还会导致波幅降低。
