Manger P R, Woods T M, Jones E G
Department of Anatomy and Neurobiology, University of California, Irvine 92717, USA.
J Comp Neurol. 1996 Aug 5;371(4):513-21. doi: 10.1002/(SICI)1096-9861(19960805)371:4<513::AID-CNE2>3.0.CO;2-7.
Details of the representation of body regions innervated by the trigeminal nerve were elucidated in monkey cerebral cortex. Microelectrode recording was used to generate somatosensory maps in the posterior bank of the central sulcus and on the exposed cortical surface lateral to the lateral tip of the central sulcus in Macaca nemestrina. The area innervated by the contralateral trigeminal nerve is represented in an 8-mm mediolateral extent of area 3b lateral to the representation of the hand. Lateral to this, still within area 3b, there is an expanded representation of ipsilateral intra-oral structures measuring 6 mm in mediolateral extent. Both representations fill area 3b anteroposteriorly. The ipsilateral representation forms approximately 40% of the trigeminal representation, consistent with the amount of the ventroposterior medial (VPM) thalamic nucleus devoted to representation of ipsilateral intra-oral structures. Comparison of the present results with maps of the face representation in other species of monkey shows a consistent somatotopy of the face between species; size variations are mainly related to the enlarged ipsi- and contralateral representations of the cheek pouches in macaques. The general somatotopy of the trigeminal representation in monkeys is consistent with that in other mammalian species.
在猕猴大脑皮层中阐明了由三叉神经支配的身体区域的表征细节。在豚尾猕猴中，使用微电极记录在中央沟后壁和中央沟外侧尖端外侧暴露的皮质表面生成体感图谱。由对侧三叉神经支配的区域在手的表征外侧3b区8毫米的内外侧范围内呈现。在此外侧，仍在3b区内，有同侧口腔内结构的扩展表征，内外侧范围为6毫米。这两种表征在前后方向上占据3b区。同侧表征约占三叉神经表征的40%，这与丘脑腹后内侧核（VPM）中用于表征同侧口腔内结构的量一致。将目前的结果与其他猕猴物种的面部表征图谱进行比较，结果显示不同物种之间面部存在一致的躯体定位；大小差异主要与猕猴脸颊袋同侧和对侧表征的扩大有关。猕猴中三叉神经表征的一般躯体定位与其他哺乳动物物种一致。
