Glickstein M
Dept of Anatomy, University College London, Gower Street, WC1E 6BT., London, UK.
Trends Neurosci. 2000 Dec;23(12):613-7. doi: 10.1016/s0166-2236(00)01681-7.
Visual areas of the brain must be connected to motor areas for the sensory guidance of movement. The first step in the pathway from the primary visual cortex is by way of the dorsal stream of visual areas in the parietal lobe. The fact that monkeys can still guide their limbs visually after cortico-cortical fibres have been severed suggests that there are subcortical routes that link visual and motor areas of the brain. The pathway that runs from the pons and cerebellum is the largest of these. Pontine cells that receive inputs from visual cortical areas or the superior colliculus respond vigorously to appropriate visual stimuli and project widely on the cerebellar cortex. A challenge for future research is to elucidate the role of these cerebellar target areas in visuo-motor control.
大脑的视觉区域必须与运动区域相连，以便对运动进行感觉引导。从初级视觉皮层开始的通路的第一步是通过顶叶视觉区域的背侧流。猴子在皮质-皮质纤维被切断后仍能通过视觉引导其肢体，这一事实表明存在连接大脑视觉和运动区域的皮质下通路。从脑桥和小脑发出的通路是其中最大的一条。接受来自视觉皮层区域或上丘输入的脑桥细胞对适当的视觉刺激有强烈反应，并广泛投射到小脑皮层。未来研究面临的一个挑战是阐明这些小脑目标区域在视觉运动控制中的作用。
