期刊
FRONTIERS IN NEUROANATOMY
卷 5, 期 -, 页码 -出版社
FRONTIERS RES FOUND
DOI: 10.3389/fnana.2011.00034
关键词
microstimulation; posterior parietal cortex; behavior; motor cortex; visual cortex; sensorimotor processing; anatomical tracers
资金
- NEI NIH HHS [R01 EY002686] Funding Source: Medline
- NINDS NIH HHS [R01 NS016446] Funding Source: Medline
In Prosimian primates, NewWorld monkeys, and OldWorld monkeys microstimulation with half second trains of electrical pulses identifies separate zones in posterior parietal cortex (PPC) where reaching, defensive, grasping, and other complex movements can be evoked. Each functional zone receives a different pattern of visual and somatosensory inputs, and projects preferentially to functionally matched parts of motor and premotor cortex. As PPC is a relatively small portion of cortex in most mammals, including the close relatives of primates, we suggest that a larger, more significant PPC emerged with the first primates as a region where several ethologically relevant behaviors could be initiated by sensory and intrinsic signals, and mediated via connections with premotor and motor cortex. While several classes of PPC modules appear to be retained by all primates, elaboration and differentiation of these modules likely occurred in some primates, especially humans.
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