L4-MONOPOLAR NEURON - SUBSTRATE FOR LATERAL INTERACTION IN VISUAL SYSTEM OF FLY MUSCA-DOMESTICA (L)
L4-MONOPOLAR NEURON - SUBSTRATE FOR LATERAL INTERACTION IN VISUAL SYSTEM OF FLY MUSCA-DOMESTICA (L)
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DOI：
10.1016/0006-8993(73)90254-0
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发表时间：
1973-01-01
期刊：
影响因子：
2.9
通讯作者：
CAMPOSOR.JA
中科院分区：
文献类型：
--
作者：
STRAUSFELD, NJ;CAMPOSOR.JA
果蝇视觉系统的第一突触区的视神经盒通过一组来自L4单极细胞的侧枝相互连接。这些神经元是唯一的传出单极细胞接触的元素在一个以上的盒。高尔基体浸渍细胞的电子显微镜显示，L4的远侧（外）突起组与单个盒的固有层细胞的α轮廓接触，并且是突触后的。L4的近端（内）侧支，位于椎板的内表面，接触其自身和两个相邻盒的受体终末和放射状单极细胞（L1和L2）。一个L4与6个周围试剂盒的其他6个L4单元的组件相连接。常规固定的材料表明，L4的近侧枝是突触前的放射状单极细胞和一些受体末梢，以及突触前和突触后的其他L4神经元组件，它们延伸到，或延伸到他们。与α纤维相连的突触后远端突起的数量在整个眼睛中是不同的。从后到前，从眼睛的背极和腹极向赤道逐渐增加。
Optic cartridges of the first synaptic region of the fly's visual system are interconnected by a set of collaterals derived from the L4 monopolar cells. These neurones are the only efferent monopolar cells to contact elements in more than one cartridge. Electron microscopy of Golgi-impregnated cells has shown that sets of distal (outer) processes of L4 contact, and are postsynaptic to, the α profiles of lamina intrinsic cells at single cartridges. L4's proximal (inner) collaterals, situated at the inner face of the lamina, contact the receptor terminals and the radial monopolar cells (L1 and L2) of its own and of two adjacent cartridges. One L4 meets components of 6 other L4 cells of 6 surrounding cartridges. Conventionally fixed material shows that the proximal collaterals of L4 are presynaptic to radial monopolar cells and some receptor endings as well as being pre-and postsynaptic to the other L4 neuronal components to which they extend, or which extend to them. The numbers of the distal processes postsynaptic to α fibres vary across the eye. There is a graded increase from back to front and from the dorsal and ventral poles of the eye towards its equator.