摘要
直接刺激嗅神经在Mauthner细胞上引起分级的复合兴奋性突触后电位(EPSP)。嗅神经诱发的EPSP包含两个性质不同的成分。第1成分的潜伏期短(平均为0.62ms),持续时间短,对高频率刺激不敏感。第2成分继第1成分之后发生,持续时间长达4 ms以上,为典型的复合波形状,对高频率刺激敏感,当后续刺激的间隔期由27 s缩短至100 ms时,其幅度衰减为原来的40％。
Direct stimulation of the olfactory nerves evoked a graded, complex excitory postsynap- tic potential (EPSP)on the Mauthner cell. The evoked EPSP was composed of two compo- nents with different characterastics. The latency of the first component was shorter with a average of 0. 62 ms and not sensitive to higher frequency stimulations. The second compo- nent closely followed the first one. It lasted more than 4 ms and presented a typical complex waveform. It was very sensitive to higher frequency stimulation; its amplitude declined by 40% while the stimulation interval shortened from 27 s to 100 ms.
基金
国家自然科学基金
