Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus
Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus
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蟋蟀神经隔离层髓质复合体的昼夜节律
DOI：
10.1016/0022-1910(86)90077-6
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发表时间：
1986
影响因子：
2.2
通讯作者：
Y. Chiba
中科院分区：
文献类型：
--
作者：
K. Tomioka;Y. Chiba
使用抽吸电极从细胞外记录蟋蟀（Gryllus bimaculatus）视叶的神经隔离层髓质复合体的传出神经元活动。层髓复合眼系统的多单位活动在恒定条件下表现出清晰的昼夜节律。在恒定光照下，所有样本在主观夜间均表现出峰值放电频率，自由运行时间超过24小时。另一方面，在持续黑暗的标本中或在视神经被切断的昆虫中，昼夜或夜间的增加发生。脑叶和/或食管下神经节的切除不会影响这些节律。这些结果可以被视为几乎确凿的证据，表明椎板髓质复合体涉及一种神经机制，即昼夜节律振荡器，它可以在没有来自其他中枢神经系统结构的任何神经输入的情况下产生周期性活动。
Efferent neuronal activities of the neurally isolated lamina-medulla-complex of the cricket (Gryllus bimaculatus) optic lobe were recorded extracellularly from the optic stalk using a suction electrode. The multiple unit activities of the lamina-medulla-compound eye-system exhibited clear circadian rhythms under constant conditions. In constant light, all specimens exhibited a peak discharge frequency in the subjective night, free-running with a period longer than 24 h. On the other hand, either diurnal or nocturnal increase occurred in specimens kept under constant darkness or in insects with optic nerve severed. Removal of the cerebral lobe and/or suboesophageal ganglion did not affect these rhythms. These results may be regarded as almost conclusive evidence that the lamina-medulla-complex involves a neural mechanism, i.e. a circadian oscillator, which can generate periodic activity without any neural input from the other central nervous system structures.