江鳕（Lota lota）侧线器官中传出纤维的突触后作用。
The post-synaptic action of efferent fibres in the lateral line organ of the burbot Lota lota.
作者信息
Flock A, Russell I J
出版信息
J Physiol. 1973 Dec;235(3):591-605. doi: 10.1113/jphysiol.1973.sp010406.
Abstract
- The post-synaptic action of efferent fibres on lateral line organs in the burbot was investigated with extracellular electrodes.2. Selective excitation of efferent fibres or stimulation of the lateral line nerve causes a negative efferent potential in the epithelium, an increase in the microphonic potential, and inhibition of afferent nerve impulses.3. Stimulation of the lateral line nerve causes antidromic impulses in the afferent fibres in addition to exciting the efferent fibres. However, stimulation of the lateral line nerve has no post-synaptic influence on lateral line organs when the efferent synapses are selectively blocked by gallamine.4. The influence of efferent stimulation on the microphonic potential is greater at large amplitudes of mechanical stimulation than at low.5. The similarities between the effects of efferent stimulation in the lateral line organ and in the cochlea suggest similar synaptic mechanisms.
摘要
用细胞外电极研究了传出纤维对江鳕侧线器官的突触后作用。
传出纤维的选择性兴奋或侧线神经的刺激会导致上皮中出现负向传出电位、微音器电位增加以及传入神经冲动受到抑制。
刺激侧线神经除了兴奋传出纤维外，还会在传入纤维中引发逆向冲动。然而，当传出突触被加拉明选择性阻断时，刺激侧线神经对侧线器官没有突触后影响。
在机械刺激幅度较大时，传出刺激对微音器电位的影响比幅度较小时更大。
侧线器官和耳蜗中传出刺激效应之间的相似性表明存在相似的突触机制。
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