INPUTS FROM MOTOR AND PREMOTOR CORTEX TO THE SUPERIOR COLLICULUS OF THE MACAQUE MONKEY
INPUTS FROM MOTOR AND PREMOTOR CORTEX TO THE SUPERIOR COLLICULUS OF THE MACAQUE MONKEY
复制标题
DOI：
10.1016/0166-4328(85)90066-x
复制
发表时间：
1985-11-01
影响因子：
2.7
通讯作者：
FRIES, W
中科院分区：
文献类型：
--
作者：
FRIES, W
在使用辣根过氧化物酶（HRP）对猴子皮质顶盖投射进行的逆行研究中，发现额叶的投射不仅起源于额眼区和前额叶联合皮层，而且还起源于运动皮层和前运动皮层。即使将少量 HRP 注射到上丘的浅层，也会在弓状沟前岸的无颗粒皮质（区域 6）中产生标记细胞。在对所有层进行大的丘脑注射后，在运动皮层和前运动皮层中都发现了标记细胞。这个投影似乎是按地形组织的。注射到上丘前外侧部分的标记细胞分布在假定的手指-手-臂-肩表征内，而在尾部注射更多后，标记细胞更多地出现在假定的臂-躯干表征中。未发现辅助运动皮层含有标记细胞。运动皮层中的皮层细胞与前运动皮层中的皮层细胞的大小分布不同，前者较小，后者既小又大。考虑到上丘在个人空间表征中的作用及其可能参与转向臂和手部运动，讨论了上丘的运动和前运动输入对于感觉（特别是视觉）运动引导的功能意义。
In retrograde studies of corticotectal projections in the monkey using horseradish peroxidase (HRP), projections of the frontal lobes were found to originate not only from the frontal eye fields and prefrontal association cortex but also from both motor and premotor cortex. Even small HRP injections into the superficial layers of the superior colliculus yielded labelled cells in the agranular cortex (area 6) of the anterior bank of the arcuate sulcus. After large collicular injections affecting all layers, labelled cells were found in both motor and premotor cortex. This projection appeared to be topographically organized. Injections into the anterolateral parts of the superior colliculus labelled cells that were distributed within the presumed finger-hand-arm-shoulder representation, whereas after more caudal injections labelled cells occurred more in the presumed arm-trunk representation. The supplementary motor cortex was not found to contain labelled cells. The corticotectal cells in the motor cortex differed from those in the premotor cortex in their size distribution, the former being small, the latter both small and large. The functional significance of the motor and premotor input into the superior colliculus for sensory, and particularly visual, guidance of movements is discussed in view of a collicular role in the extrapersonal space representation and of its possible participation in steering arm and hand movements.