総説 大脳皮質の単位回路
総説 大脳皮質の単位回路
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回顾:大脑皮层的单元回路
DOI:
10.11477/mf.1416201197
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
丸岡 久人
中科院分区:
文献类型:
--
作者:
細谷 俊彦;中川 直;米田 泰輔;丸岡 久人
The mammalian neocortex contains diverse cell types but whether they organize into repeated modular circuits remains unknown. We discovered that major cell types in neocortical layer 5 form a lattice structure in many areas of the brain. Large-scale three-dimensional imaging revealed that distinct types of excitatory and inhibitory neurons form cell type-specific radial clusters termed microcolumns. Microcolumns form a hexagonal lattice tessellating a wide region of the neocortex. Neurons within individual microcolumns exhibit synchronized in vivo activity and visual responses with similar orientation preference and ocular dominance. During early postnatal development, microcolumns are coupled by cell type-specific gap junctions and later received convergent synaptic inputs. Thus, layer 5 neurons organize into a brain-wide modular system providing a template for cortical processing.