Gap junctions between dendrites and somata of neurons in the primate sensori-motor cortex
Gap junctions between dendrites and somata of neurons in the primate sensori-motor cortex
复制标题
灵长类感觉运动皮层神经元树突和体细胞之间的间隙连接
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
T. Powell
中科院分区：
文献类型：
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作者：
J. Sloper;T. Powell
在灵长类动物的运动和躯体感觉皮层的深层中，很少发现两个树突之间或树突与细胞体之间存在间隙连接。在这些连接处，两个剖面的质膜的外小叶紧密相连，它们之间有2nm的间隙，在切向截面上显示出六边形亚基的结构。这些间隙连接主要发生在树突之间或树突与大星状细胞的体细胞之间，但在一些例子中也与树突-树突突触有关，因此发生在大星状树突和突触前树突之间；桥粒也可能与间隙连接和树突-树突突触相关。间隙连接已被确定为许多部位的细胞之间的电传递位点，因此表明感觉-运动皮层中的一些神经元是电张力耦合的。
Gap junctions have been found infrequently between two dendrites or a dendrite and a cell soma in the deep layers of both the motor and somatic sensory cortices of the primate. At these junctions the outer leaflets of the plasma membranes of both profiles are intimately apposed with a gap of 2 nm between them which shows a structure of hexagonal subunits in tangential sections. These gap junctions occur mainly between the dendrites or dendrites and somata of large stellate cells but are also associated in some examples with a dendro-dendritic synapse and thus occur between large stellate dendrites and presynaptic dendrites; a desmosome may also occur in association with a gap junction and dendro-dendritic synapse. Gap junctions have been identified as sites of electrical transmission between cells in a number of sites and it is therefore suggested that some neurons in the sensori-motor cortex are electrotonically coupled.