Abstract
The acoustic startle response (ASR) was elicited with tone pips in sensorineural hearing-impaired DBA/2 mice and in non-impaired C57BL/6 mice. The influence of stimulus frequency and intensity on ASR amplitude varied as a function of both strain and age. Previous neurophysiological findings indicate that ASR amplitude is correlated with the proportion of neurons in the cochlear nucleus and inferior colliculus that respond to the ASR stimulus frequencies and to the excitability of neurons in these structures. ASR amplitude is not highly correlated with threshold sensitivity. These observations suggest several neural correlates of ASR amplitude and have implications regarding central neuronal response properties associated with sensorineural hearing loss.
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