純音及びノイズに対するチンチラの皮質におけるニューロン応答

抄録

Neuronal responses in the primary auditory cortex of the chinchilla were recorded under deep anesthesia in order to define those response elements which may be useful for an assessment of cochlear function in a chronic preparation. Spontaneous activity was low; three types of tuning curves were found: narrow band, broad band and multiple tip curves. Tone stimuli yielded three types of intensity functions: monotonic, nonmonotonic and saturated functions. Poststimulus time histograms to noise stimuli exhibit a great variety of response patterns and response variability with changing intensity. It is concluded that only phasic on-responses to tone stimuli can be used to assess cochlear output in response to natural or artificial stimuli.