Small-field neurons associated with oculomotor control in muscoid flies: cellular organization in the lobula plate.
Small-field neurons associated with oculomotor control in muscoid flies: cellular organization in the lobula plate.
复制标题
与粘液蝇动眼神经控制相关的小视野神经元：小叶板中的细胞组织。
DOI：
10.1002/cne.903160106
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Gilbert,C
中科院分区：
文献类型：
--
作者：
Strausfeld,NJ;Gilbert,C
在蝇类中，小叶板是视叶中处理来自视网膜定位传入的光谱独立信息的最后一站。直到最近，人们认为大多数小叶板神经元是对方向特异性运动做出反应的颜色不敏感的宽视野切向神经元。有人认为，某些这些供应输入到运动前降神经元参与控制飞行和头部运动。目前的帐户描述了高尔基体和钴银分析报告的证据，额外的小叶板输出，这是数字复杂，结构复杂。在具有大约4，000个小眼的视网膜下，至少15个形态上不同的小视野神经元群体中的每一个包括大约110-440个元件，这些元件有助于对着整个视网膜的同构神经组装。形态学上，小野传出神经根据其轴突的起源及其在小叶板和小叶中的分支形成三类。从小叶板产生的神经元，或由它和小叶共享，访问背侧下降神经元供应颈部和飞行电机相反，从小叶的输出神经元，其项目到腹侧下降神经元供应腿部运动神经元。讨论了小视野小叶板输出到中脑背侧下行神经元的可能功能意义。
In muscoid flies, the lobula plate is the last station in the optic lobes for processing spectrally independent information from retinotopic afferents. Until recently, it was thought that most lobula plate neurons were color‐insensitive wide‐field tangential neurons that respond to direction‐specific motion. It has been suggested that certain of these supply inputs to premotor descending neurons involved in the control of flight and head movements. The present account describes a Golgi and cobalt‐silver analysis that reports evidence for additional lobula plate outputs, which are numerically complex and structurally elaborate. Beneath a retina with approximately 4,000 ommatidia, each of at least 15 populations of morphologically distinct small‐field neurons comprises approximately 110–440 elements that contribute to an isomorphic neural assembly subtending the whole retina. Morphologically small‐field efferents form three classes according to the origin of their axons and their arborization in the lobula plate and lobula. Neurons arising from the lobula plate, or shared by it and the lobula, visit dorsal descending neurons supplying the neck and flight motor in contrast to output neurons from the lobula, which project to ventral descending neurons supplying leg motor neuropils. The possible functional significance of small‐field lobula plate outputs onto descending neurons in the dorsal deutocerebrum is discussed.