Huerta M F, Pons T P
Department of BioStructure and Function, University of Connecticut Health Center, Farmington 06030.
Brain Res. 1990 Dec 24;537(1-2):367-71. doi: 10.1016/0006-8993(90)90388-r.
Intracortical microstimulation was used to define topographic sectors and the rostral border of primary motor cortex in adult macaques (Macaca mulatta). In the same animals, injections of fluorescent tracers were made within defined regions of primary motor cortex. Retrogradely labeled neurons were topographically distributed in area 3a, with most neurons located in layer III, and fewer neurons situated in layers V and IV. These findings suggest that muscle afferent information, thought to be important in a closed-loop mode of function, may reach primary motor cortex directly from cortical area 3a.
在成年猕猴（恒河猴）中，采用皮质内微刺激来确定初级运动皮层的地形分区和吻侧边界。在相同的动物中，在初级运动皮层的特定区域内注射荧光示踪剂。逆行标记的神经元在3a区呈地形分布，大多数神经元位于III层，V层和IV层中的神经元较少。这些发现表明，被认为在闭环功能模式中很重要的肌肉传入信息可能直接从皮质3a区到达初级运动皮层。
