NEUROMUSCULAR JUNCTIONS IN FLIGHT AND TYMBAL MUSCLES OF THE CICADA
NEUROMUSCULAR JUNCTIONS IN FLIGHT AND TYMBAL MUSCLES OF THE CICADA
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DOI：
10.1083/jcb.4.3.251
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发表时间：
1958-01-01
期刊：
影响因子：
--
通讯作者：
DEHARVEN, E
中科院分区：
文献类型：
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作者：
EDWARDS, GA;RUSKA, H;DEHARVEN, E
蝉的鼓膜肌纤维在结构细节上与间接飞行肌纤维非常相似。我们同意其他作者的观点，即鼓膜肌是一种改良的间接飞行肌。鼓膜和飞行肌纤维的周围神经分支与黄蜂腿中的类似。轴突被不规则的中轴突松散地包裹着，包围着细胞质。因此，该神经是被膜神经。高频肌纤维中的神经肌肉接头显示轴突和肌纤维的质膜直接并置，轴突中有大量线粒体和突触小泡，肌纤维突触后区域有大量线粒体、突触后颗粒和内质网。特别令人感兴趣的是突触后区域的大量细胞内相对膜。它们形成层状堆叠和螺旋、囊泡、囊泡和小管。它们偶尔表现出与质膜、外核膜和周原纤维内质网的连续性。该区域的膜系统被称为“突触网”。据信它可以增加神经肌肉接头的电容量，用于电位的传输，并且可能是高频肌纤维中振荡机制的部位。
The tymbal muscle fiber in the cicada closely resembles the indirect flight muscle fiber in its structural detail. We agree with other authors that the tymbal muscle is a modified indirect flight muscle. The peripheral nerve branches to the tymbal and flight muscle fibers are similar to those in the wasp leg. The axon is loosely mantled by irregular turns of the mesaxon, enclosing cytoplasm. The nerve is therefore a tunicated nerve. The neuromuscular junction in the high frequency muscle fibers shows direct apposition of plasma membranes of axon and muscle fiber, large numbers of mitochondria and synaptic vesicles in the axon, and concentrations of mitochondria, aposynaptic granules, and endoplasmic reticulum in the postsynaptic area of the muscle fiber. Of special interest is the multitude of intracellular, opposing membranes in the postsynaptic area. They form laminated stacks and whorls, vesicles, cysternae, and tubules. They occasionally show continuity with the plasma membrane, the outer nuclear envelope, and the circumfibrillar endoplasmic reticulum. The membrane system in this area is designated "rete synapticum". It is believed to add to the electrical capacity of the neuromuscular junction, to serve in transmission of potentials, and possibly is the site of oscillating mechanism in high-frequency muscle fibers.