SYNAPTIC PATTERNS IN DORSAL LATERAL GENICULATE NUCLEUS OF MONKEY
SYNAPTIC PATTERNS IN DORSAL LATERAL GENICULATE NUCLEUS OF MONKEY
复制标题
DOI：
10.1007/bf00335403
复制
发表时间：
1970-01-01
期刊：
影响因子：
--
通讯作者：
COLONNIER, M
中科院分区：
文献类型：
--
作者：
GUILLERY, RW;COLONNIER, M
突触连接存在于细胞核的所有部分，几乎与这些层内一样密集地分布在细胞层之间。除了六个经典细胞层之外，还发现了两个薄的插入层，位于层 1 的每一侧。这些层包含嵌入在小神经突区域中的小神经元，并且在那里出现许多轴突突触。三种类型的轴突在所有细胞层中形成突触，并已被称为 RLP、RSD 和 F 轴突。 RLP 轴突具有大末端，其中含有松散堆积的圆形突触小泡，RSD 轴突具有小末端，其中含有紧密堆积的圆形小泡，F 轴突具有中等大小的末端，含有许多扁平小泡。RLP 轴突被鉴定为视网膜原纤维。它们的末端局限于细胞层，在大树突上形成丝状接触，在大树突和 F 轴突上形成不对称的规则突触接触（具有薄的突触后不透明性）。 RSD 轴突终止于细胞层内以及细胞层之间。它们在小树突和 F 轴突上形成不对称的规则突触接触。 F 轴突也存在于整个细胞核中，在膝状神经元的所有部分上以及与其他 F 轴突形成对称的规则接触。在轴突-轴突连接处，F 轴突始终位于突触后。
Synaptic junctions are found in all parts of the nucleus, being almost as densely distributed between cell laminae as within these laminae.In addition to the six classical cell laminae, two thin intercalated laminae have been found which lie on each side of lamina 1. These laminae contain small neurons embedded in a zone of small neural processes and many axo-axonal synapses occur there.Three types of axon form synapses in all cell laminae and have been called RLP, RSD and F axons. RLP axons have large terminals which contain loosely packed round synaptic vesicles, RSD axons have small terminals which contain closely packed round vesicles and F axons have terminals intermediate in size containing many flattened vesicles.RLP axons are identified as retinogeniculate fibers. Their terminals are confined to the cell laminae, where they form filamentous contacts upon large dendrites and asymmetrical regular synaptic contacts (with a thin postsynaptic opacity) upon large dendrites and F axons. RSD axons terminate within the cellular laminae and also between them. They form asymmetrical regular synaptic contacts on small dendrites and on F axons. F axons, which also occur throughout the nucleus, form symmetrical regular contacts upon all portions of the geniculate neurons and with other F axons. At axo-axonal junctions the F axon is always postsynaptic.