Parain D, Delapierre G
Laboratoire de Biophysique-Explorations Neurologiques, Centre Hospitalier Universitaire, Hôpital Charles Nicolle, Rouen, France.
Brain Topogr. 1991 Fall;4(1):31-5. doi: 10.1007/BF01129663.
We assessed the influence of increasing stimulus intensity from motor threshold to pain threshold on short latency somatosensory evoked potentials recorded over the parietal and frontal scalp in 14 subjects during median nerve stimulation at the wrist. We used the curvature polynomial coefficient to evaluate alterations of the main components. The N20 and P27 curvature coefficients are not modified. The change of the N30 curvature coefficient is the result of shortened P45 latency. The increase of N60 curvature coefficient shows a great interindividual variability, probably due to a central amplification and synchronization or to involvement of nerve fibres with different excitability.
我们评估了在手腕部正中神经刺激期间，将刺激强度从运动阈值增加到疼痛阈值，对14名受试者顶叶和额叶头皮记录的短潜伏期体感诱发电位的影响。我们使用曲率多项式系数来评估主要成分的变化。N20和P27曲率系数未改变。N30曲率系数的变化是P45潜伏期缩短的结果。N60曲率系数的增加显示出个体间的巨大差异，这可能是由于中枢放大和同步，或者是由于不同兴奋性的神经纤维的参与。
