加压阻滞循经感传时皮层体觉诱发电位地形图的分布特点

The Topographical Feature of Cortical Somatosensory Evoked Potential during Blocking of the Propagated Sensation along Meridians

应用脑诱发电位地形图技术观察加压阻滞循经感传时皮层第一体觉区(SI)机能活动的变化。对11名循经感传显著的志愿者观察的结果表明,未加压阻滞循经感传时,在皮层体觉区的下肢和面部代表区同时出现了高电位反应。当以机械压迫阻滞感传,皮层体觉诱发电位地形图上只在下肢代表区出现一个反应,面部代表区的反应消失。这一结果为外周动因激发是产生循经感传现象的决定性因素的假说提供更为有力的实验证据。

The topographical technique of brain evoked potential was used to investigate the changes of the functional activities in primary cortical somatosensorv area(SI) during blocking of the propagated sensation along meridian (PSM) by the mechanical pressure. Eleven volunteers with marked PSM were taken under observation. The results showed that the responses simultaneously appeared in both the foot and face representation of SI during advance of PSM without blocking. However, the response in the face representation disappeared and it was confined to foot representation of SI when the PSM was blocked by mechanical pressure. The results provide experimental evidence for the supposition that 'activa-tion on sequence in periphery' is the decisive factor for the formation of PSM. ( Original article on page 657)