Suppression of auditory cortical activities in awake cats by pure tone stimuli

Neuroscience Letters
Ling Qin, Yu Sato

Abstract

Based on the time courses of excitatory spike-responses to pure-tone stimuli, neurons in the primary auditory cortex (A1) of awake cats have been classified into the phasic cell (P-cell), the tonic cell (T-cell), and the phasic-tonic cell (PT-cell). In the present study, taking advantage of the presence of the spontaneous spike-activities of A1 neurons in awake animals, time courses of suppressive spike-responses to pure-tone stimuli were studied by constructing spectro-temporal spike-activity diagrams. In P-cell, the suppression and excitation temporally alternated and spectrally co-occurred, restricting excitatory spike-responses within narrow temporal limits but not setting the spectral limits. In T-cell, the suppression and excitation spectrally alternated and temporally co-occurred, restricting excitatory frequency-tuning but not setting the time limits. PT-cell has mixed response properties of P- and T-cells. The findings suggest that: (1) P-cell analyzes temporal information of the sound without active spectral limits, (2) T-cell analyzes spectral information without limits of time, and (3) PT-cell analyzes spectrally and temporally complex auditory information. Taken in the light of recent findings that the shift of the...Continue Reading

References

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Feb 15, 2003·Science·Dennis L Barbour, Xiaoqin Wang

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Citations

Sep 21, 2010·Cerebral Cortex·Juan M AbolafiaM V Sanchez-Vives
Apr 12, 2007·The European Journal of Neuroscience·Zinaida A TamarovaIrina N Beloozerova
Jul 18, 2006·Current Opinion in Neurobiology·Anne-Marie M OswaldAlex D Reyes

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