Asymmetry of motor impulses and neuromuscular synapses produced in crayfish claws by unilateral immobilization
Asymmetry of motor impulses and neuromuscular synapses produced in crayfish claws by unilateral immobilization
复制标题
单侧固定小龙虾爪产生的运动冲动和神经肌肉突触的不对称性
DOI：
10.1007/bf00615146
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
H. Atwood
中科院分区：
文献类型：
--
作者：
P. Pahapill;G. Lnenicka;H. Atwood
SummaryThe ‘fast’ axon supplying the closer muscle in crayfish (Procambarus clarkii) normally fires few impulses and generates large excitatory postsynaptic potentials (EPSPs) that fatigue rapidly with repeated stimulation. When the dactyl of one claw is immobilized in the closed position, impulse production in the fast axon decreases on the immobilized side and increases on the contralateral side. On the immobilized side, EPSPs become larger but more readily depressed with repeated stimulation, while converse changes occur on the contralateral side.In order to establish whether the smaller number of impulses on the immobilized side was responsible for the changes in EPSPs, extra impulses were generated in the fast axon of immobilized claws by implanting electrodes in the claw. Raising the impulse production to equal or exceed that of the contralateral side did not prevent the changes in EPSPs produced by immobilization. Thus, it is probable that changes in the level of synaptic input to central parts of the fast closer excitor neuron are mainly responsible for altered physiological properties of peripheral synapses, rather than the fast axon's impulse traffic per se.
