Comparative Physiological Studies of Stato Acoustic Organ in Chicken and Rat

Abstract

The dissimilarities insensitivity of the cochleovestibular neurons is remarkable at 10 kHz. The cochleovestibular neural responses are much more peculiar in the chickens than the rats, but many basic principles of the tonotopic development of the SAO and mechanism are somewhat the same in both animals. The coefficient variations (CVs) varied orderly as a function of the active sensory neurons of cells in both animals at a low range of stimulus frequencies but not at high stimulus frequency. the longer irregular bursting patterns were commonly observed in rats cochleovestibular sensory neurons, this feature has also shown by the chickens cochleovestibular sensory neurons but for a very short time. This features mostly appeared at low stimulus frequency and low stimulus intensity in both animals. The sensitivity of the vestibular system increased when the stimulus intensity was constant between 2-8 kHz frequencies. These responses were continued from 2 to 10 kHz stimulus frequency in both animals but the responses are contrasted in both animals.