大自鼠膈肌经不均匀牵张处理后,在牵张适度的肌纤维终板区,以细胞内微电极技术可同时记录到正常的迷质量子式自发释放产生的微终板电位(MEPP),较高幅度的递质量子式诱发释放引起的终板电位(EPP)和接近正常水平的静息膜电位(RMP)。此标本被认为是处于接近正常生理状态的神经肌肉接头标本。本研究观察不均匀牵张处理对突触前递质释放对Ca~(2+)浓度的依赖性和突触后肌纤维电生理学性质的影响。 After the asymmetric distraction treatment of diaphragmatic muscle in rats, the micro-terminal plateau potential (MEPP) generated by spontaneous release of the mock mass subunits can be simultaneously recorded by the intracellular microelectrode technique in the moderate end-stretch muscle fibers. The higher amplitude delivered mass-induced release of endplate potentials (EPP) and near normal resting membrane potential (RMP). This specimen is considered to be near the normal physiological state of the neuromuscular junction specimens. This study was to investigate the effect of uneven stretch on the concentration of Ca ~ (2+) and the electrophysiological properties of post-synaptic muscle fibers.