Alonso J A, Hajdu M, Gonzalez E G, Michelsen C, Semedei R
Department of Rehabilitation Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032-3784.
Arch Phys Med Rehabil. 1989 Mar;70(3):194-8.
Supine and sitting lower extremity cortical somatosensory evoked potential (CSEP) examinations were performed in 30 healthy volunteers to establish normal values and to determine variations in SEP parameters caused by positional changes, side of stimulation, and the influence of height. CSEPs were recorded at Cz'-Fz (10-20 international EEG system) after stimulation of the saphenous, peroneal, and sural nerves at the ankle. Each nerve was tested in the supine and sitting positions. CSEP P1, N1 latencies and P1 - N1 amplitudes were recorded. The mean values of these parameters and side-to-side differences were determined for both positions. Parameter changes between the two positions were also determined. No statistically significant difference was found when comparing supine and sitting, or side-to-side values (p greater than 0.05). Regression analyses of P1 latency vs height revealed a significant positive correlation for both positions (p less than 0.0001-0.0045). Mean P1 and N1 latencies (msec) +/- 1SD, and mean P1 - N1 amplitudes (microV) +/- 1SD are as follows: peroneal nerve (n = 119) P1 = 39.5 +/- 2.98, N1 = 48.2 +/- 3.79, P1 - N1 = 1.41 +/- 0.81; sural nerve (n = 119) P1 = 41.3 +/- 4.03, N1 = 50.9 +/- 4.57, P1 - N1 = 1.31 +/- 0.61; saphenous nerve (n = 119) P1 = 41.5 +/- 4.02, N1 = 50.4 +/- 4.10, P1 - N1 = 0.87 +/- 0.30. The normative data generated by this study will help clinicians to distinguish normal variations in lower extremity CSEP parameters.(ABSTRACT TRUNCATED AT 250 WORDS)
对30名健康志愿者进行了仰卧位和坐位下肢皮层体感诱发电位（CSEP）检查，以确定正常值，并确定由体位变化、刺激侧别和身高影响所导致的SEP参数变化。在踝部刺激隐神经、腓总神经和腓肠神经后，于Cz'-Fz（10-20国际脑电图系统）记录CSEP。每条神经均在仰卧位和坐位进行测试。记录CSEP的P1、N1潜伏期及P1-N1波幅。确定这两个体位下这些参数的平均值及双侧差异。还确定了两个体位之间的参数变化。仰卧位与坐位或双侧值比较时，未发现统计学显著差异（p>0.05）。P1潜伏期与身高的回归分析显示，两个体位均存在显著正相关（p<0.0001-0.0045）。腓总神经（n = 119）的平均P1和N1潜伏期（毫秒）±1SD，以及平均P1-N1波幅（微伏）±1SD如下：P1 = 39.5±2.98，N1 = 48.2±3.79，P1-N1 = 1.41±0.81；腓肠神经（n = 119）：P1 = 41.3±4.03，N1 = 50.9±4.57，P1-N1 = 1.31±0.61；隐神经（n = 119）：P1 = 41.5±4.02，N1 = 50.4±4.10，P1-N1 = 0.87±0.30。本研究生成的规范数据将有助于临床医生区分下肢CSEP参数的正常变异。（摘要截短为250字）
