Spontaneous and sound-evoked single-unit activity was recorded from afferent neurones in the cochlear ganglion of the anaesthetized pigeon. The histogram of successive intervals of spontaneous activity of 51% of neurones exhibited more short intervals than expected from a Poisson point-process description of spike times; for another 43% of neurones the point-process was Poisson. A model of spike generation was developed to account for the concentration of short spike-intervals. The proposed model contains inhibitory postsynaptic potentials at the afferent dendrite, in addition to the excitatory postsynaptic potentials. Not only does the model reproduce the first-order interval statistics of neural activity, but it provides a mechanism for improving phase-locking to the fundamental frequency of a sinusoid, and also offers an explanation for the presence of reciprocal synapses in the human cochlea.

译文

:从麻醉鸽子的耳蜗神经节传入神经元记录了自发和发声的单单位活动。 51%的神经元自发活动的连续间隔的直方图显示的间隔比根据尖峰时间的Poisson点过程描述所预期的要短。对于另外43%的神经元,点过程是泊松。开发了尖峰生成模型来说明短尖峰间隔的集中。所提出的模型除兴奋性突触后电位外,还包含传入树突处的抑制性突触后电位。该模型不仅可以再现神经活动的一阶间隔统计信息,而且还提供了一种机制,可以改善对正弦波基本频率的锁相,还可以解释人耳蜗中是否存在相互的突触。

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