Govind C K, Walrond J P
Life Sciences Division, Scarborough Campus, University of Toronto, Ontario, Canada.
J Neurobiol. 1989 Jul;20(5):409-21. doi: 10.1002/neu.480200511.
Crustacean motor axons innervate muscle fibers via a multiplicity of synaptic terminals which release small but variable amounts of transmitter. Differences in release performance appear to be correlated with the size of synaptic contacts and presynaptic dense bars (active zones). These structural parameters proliferate via sprouting from existing synaptic terminals and relocate to ever more distal sites during development and growth of an identified axon. Moreover, alterations in number of synaptic contacts and active zones occur in adults following stimulation or decentralization, demonstrating structural plasticity of crustacean neuromuscular synapses.
甲壳类动物的运动轴突通过多个突触终末支配肌纤维，这些突触终末释放少量但可变的递质。释放性能的差异似乎与突触接触的大小和突触前致密小体（活性区）相关。在已识别轴突的发育和生长过程中，这些结构参数通过从现有突触终末出芽而增加，并迁移到越来越远的部位。此外，在刺激或去神经支配后，成体中突触接触和活性区的数量会发生改变，这表明甲壳类动物神经肌肉突触具有结构可塑性。
