Jones E G, Schwark H D, Callahan P A
Exp Brain Res. 1986;63(2):310-20. doi: 10.1007/BF00236848.
Single and multiunit mapping was used to determine the extent of the representation of ipsilateral structures in the ventral posterior medial (VPM) nucleus of the thalamus in cynomolgus monkeys. The extent of the VPM occupied by terminations of afferent fibers arising in the ipsilateral principal trigeminal nucleus was also determined by anterograde transport of horseradish peroxidase. Both methods indicate that most of the medial half of VPM is occupied by the ipsilateral representation. This is much larger than previously suspected. Units in the medial half of VPM have small, well localized receptive fields on the ipsilateral side of the lower lip, tongue and palate, in the ipsilateral cheek pouch and on the ipsilateral teeth. The representation is largest for the ipsilateral side of the tongue and the cheek pouch. Most units in the lateral half of VPM have small, contralateral receptive fields. Few units in VPM have bilateral receptive fields. VPM is clearly distinguishable by cytochrome oxidase (CO) staining. Anteroposteriorly elongated, CO-positive aggregations correspond to elongated aggregations of units with the same or closely similar receptive fields, especially in the medial, ipsilateral representation.
采用单单位和多单位映射法来确定食蟹猴丘脑腹后内侧（VPM）核中同侧结构的代表范围。通过辣根过氧化物酶的顺行运输，还确定了同侧三叉神经主核传入纤维终末所占据的VPM范围。两种方法均表明，VPM内侧半的大部分区域被同侧代表所占据。这比之前怀疑的要大得多。VPM内侧半的神经元在下唇、舌和腭的同侧、同侧颊囊和同侧牙齿上具有小的、定位良好的感受野。舌和颊囊同侧的代表区域最大。VPM外侧半的大多数神经元具有小的对侧感受野。VPM中很少有神经元具有双侧感受野。VPM可通过细胞色素氧化酶（CO）染色清晰区分。前后拉长的CO阳性聚集区对应于具有相同或非常相似感受野的神经元的拉长聚集区，尤其是在同侧的内侧代表区域。
