COLOR IMAGING OF PARIETAL AND FRONTAL SOMATOSENSORY POTENTIAL FIELDS EVOKED BY STIMULATION OF MEDIAN OR POSTERIOR TIBIAL NERVE IN MAN
COLOR IMAGING OF PARIETAL AND FRONTAL SOMATOSENSORY POTENTIAL FIELDS EVOKED BY STIMULATION OF MEDIAN OR POSTERIOR TIBIAL NERVE IN MAN
复制标题
DOI：
10.1016/0168-5597(85)90030-9
复制
发表时间：
1985-01-01
期刊：
影响因子：
--
通讯作者：
BOURGUET, M
中科院分区：
文献类型：
--
作者：
DESMEDT, JE;BOURGUET, M
以耳垂为参考记录正常青年人正中神经或胫后神经刺激的体感诱发电位（SEP）。头皮上的16个电极的系统用于以1 ms的间隔创建势场的位图图像。P14（正中SEP）或P30（胫骨SEP）远场被认为反映了内侧丘系的传入齐射，在头皮上产生了广泛的阳性。随后的组件具有特征性的局灶性分布，表明它们反映了皮质区中的1个或多个发生器。对于中位SEP，顶叶N20和特权P22显示出在起始和偏移时间以及分布上的差异，这排除了它们与相同的发生器相关。N20位于对侧，P22位于同侧。P22可以在电动机区域4和辅助电动机区域中产生。P22也不同于P27场，仅限于对侧顶叶区。额叶N30呈双侧分布，P45呈现不同特征。对于胫骨SEP，在顶叶P38（中线-同侧病灶）和N33（对侧病灶）之间没有确认相位反转。在对侧特权区的N37可能反映了在运动区的发电机。P58比P38更对称地分布，这可能是因为它在顶叶凸面上更靠后地反射发生器。N75有一个广泛的领域，重点是中线的同侧。
Somatosensory evoked potentials (SEP) to median or posterior tibial nerve stimulation were recorded with earlobe reference in normal young adults. A system of 16 electrodes on the scalp served to create bit-mapped images of the potential fields at 1 ms intervals. The P14 (median SEP) or P30 (tibial SEP) far fields thought to reflect the afferent volley in the medial lemniscus produced widespread positivity over the scalp. Subsequent components had a characteristic focal distribution suggesting that they reflected 1 or more generators in cortical areas. For the median SEP, the parietal N20 and the prerolandic P22 showed differences in onset and offset times as well as distribution that precluded their being related to the same generator. While N20 was contralateral, P22 extended ipsilaterally. P22 may be generated in the motor area 4 and the supplementary motor area. P22 was also distinct from the P27 field restricted to the contralateral parietal region. The frontal N30 had a bilateral distribution and the P45 presented variable features. For the tibial SEP, no phase reversal was confirmed between the parietal P38 (midline-ipsilateral focus) and N33 (contralateral focus). N37 over the contralateral prerolandic region might reflect a generator in the motor region. P58 was more symmetrically distributed than P38, possibly because it reflected generators more posteriorly on the parietal convexity. N75 had a widespread field with focus on the ipsilateral side of the midline.