THE THORACICO-ABDOMINAL NERVOUS SYSTEM OF AN ADULT INSECT, DROSOPHILA MELANOGASTER
THE THORACICO-ABDOMINAL NERVOUS SYSTEM OF AN ADULT INSECT, DROSOPHILA MELANOGASTER
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DOI：
10.1002/cne.900880303
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发表时间：
1948-01-01
影响因子：
2.5
通讯作者：
POWER, ME
中科院分区：
文献类型：
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作者：
POWER, ME
胸腹神经节和缩小的腹部中心合并成一个纤维体，即胸腹神经团，产生 16 对周围神经。这些融合体被一层厚厚的纤维覆盖，即顶盖，其大部分成分形成位于纵轴上的束，部分是来自大脑的颈部结缔组织的 4 个纤维束的延续。顶盖中最突出的纵向元素是 2 根巨大的纤维，它们从大脑的原始大脑水平向后延伸到胸腹质量，并在后背侧中胸神经内退出，以支配某些中胸大肌。这些纤维与头足类动物的体型大小具有相同的关系。除了顶盖中的各种纵向束外，神经节之间还有连合形式的横向束；来自翅膀肌肉神经的纤维交叉；和适当的交叉。哈特雷交叉是后者最好的例子，它显示出类似于脊椎动物视交叉的不完全纤维交叉。胸腹神经团缺乏与大脑中的肾小球体相当的肾小体，但被包围在细胞皮层中。这似乎是对成年飞虫的非大脑中枢神经系统的第一个神经学描述。
The thoracic neur-omeres and the reduced abdominal center are merged together into a single fibrous body, the thoracico-abdominal nerve mass, which produces 16 pairs of peripheral nerves. These fused bodies are overlain by a thick blanket of fibers, the tectulum, the majority of whose components form tracts which lie in the longitudinal axis and are, in part, continuations of the 4 fiber bundles of the cervical connective from the brain. The most prominent longitudinal elements in the tectulum are 2 giant fibers which extend posteriorly from proto-cerebral levels of the brain to the thoracico-abdominal mass, and exit within the posterior dorsal meso-thoracic nerves to innervate certain great mesothoracic muscles. These fibers bear the same relationship to body size as do those of cephalopods. In addition to the various longitudinal bundles in the tectulum, there are transverse tracts in the form of commissures between neuromeres; decus-sations of fibers from the wing muscles'' nerves; and proper chiasmata. The haltere chiasma is the best example of the latter, and displays an incomplete crossing of fibers analogous to that in the optic chiasma of vertebrates. The thora-cico-abdominal nervous mass lacks glomerular bodies comparable to those in the brain, but is enclosed in a cellular cortex. This appears to be the first neurological description of the non-cerebral central nervous systems of an adult winged insect.