Bilateral receptive field neurons and callosal connections in the somatosensory cortex
Bilateral receptive field neurons and callosal connections in the somatosensory cortex
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DOI：
10.1098/rstb.2000.0563
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发表时间：
2000-02-29
影响因子：
6.3
通讯作者：
Iwamura, Y
中科院分区：
文献类型：
--
作者：
Iwamura, Y
早期的研究记录了猴子和猫初级体感皮层中双侧感受野的单个神经元活动，一致认为双侧感受野只与身体中线有关，同侧信息通过胼胝体连接到达皮层，因为它们在代表身体中线结构的皮层区域密集，而在代表远端肢体的区域几乎没有。我们最近在清醒的日本猕猴（Macaca fuscata）中央后回的近尾部（2区和5区）发现了大量具有双侧接受野的神经元。我回顾了这些结果，从行为的角度讨论了这种双侧表征在中线融合理论中的功能含义，并给出了新的解释。
Earlier studies recording single neuronal activity with bilateral receptive fields in the primary somatosensory cortex of monkeys and cats agreed that the bilateral receptive fields were related exclusively to the body midline and that the ipsilateral information reaches the cortex via callosal connections since they are dense in the cortical region representing the midline structures of the body while practically absent in the regions representing the distal extremities. We recently found a substantial number of neurons with bilateral receptive fields on hand digits, shoulders-arms or legs-feet in the caudalmost part (areas 2 and 5) of the postcentral gyrus in awake Japanese monkeys (Macaca fuscata). I review these results, discuss the functional implications of this bilateral representation in the postcentral somatosensory cortex from a behavioural standpoint and give a new interpretation to the midline fusion theory.