Fitzpatrick D F, Hendricks S E, Graber B, Balogh S E, Wetzel M
Department of Psychiatry, University of Nebraska Medical Center, Omaha 68105.
Electroencephalogr Clin Neurophysiol. 1989 Mar-Apr;74(2):95-104. doi: 10.1016/0168-5597(89)90014-2.
SEPs were elicited by stimulation of the dorsal penile nerve (DPN) or posterior tibial nerve (PTN) under 3 conditions of stimulation: random and constant interstimulus intervals, and subject-initiated stimulation. Within these conditions, the effects of repeated stimulation were also examined. The latency of the N90 peak decreased with repeated stimulation. N90 amplitude decreased with increased foreknowledge as well as with repeated stimulation. Factors extracted by principal components analysis revealed similar effects. A difference between DPN and PTN stimulation was seen in a factor associated with the N90 peak, wherein the condition involving subject self-initiation of the stimulus reflected a significantly greater decrease in SEP amplitude when the DPN was stimulated. Morphological commonalities were observed in the SEPs elicited by DPN and PTN for a given subject.
通过在三种刺激条件下刺激阴茎背神经（DPN）或胫后神经（PTN）来引出体感诱发电位（SEP）：随机和恒定的刺激间隔，以及受试者自主发起的刺激。在这些条件下，还研究了重复刺激的影响。N90峰的潜伏期随重复刺激而缩短。N90波幅随预知增加以及重复刺激而降低。主成分分析提取的因素显示出类似的效应。在与N90峰相关的一个因素中，观察到DPN和PTN刺激之间的差异，其中当刺激DPN时，受试者自主发起刺激的条件下SEP波幅的降低明显更大。对于给定的受试者，在DPN和PTN引出的SEP中观察到形态学共性。
