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Functional investigations of the primary auditory cortex in the cat

© 2021 N. G. Bibikov

JSC N.N. Andreyev Acoustical Institute, 117036 Moscow, Schvernik st. 4, Russia
A.A. Kharkevich Institute for Information Transmission Problems RAS 127051 Moscow, Bolshoy Karetnyy Pereulok, 19, Russia

Received 05 Nov 2020

Electrophysiological studies of responses to sound stimuli of neurons in the cat’s primary auditory cortex are analyzed. For more than half a century, this area has been a favorite subject of research for both morphologists and specialists in the field of sensory physiology. Some early electrophysiological studies revealed high specificity of the neuronal responses to some specific sounds. However, in further studies, usually performed on anesthetized animals, the primary attention was paid to the cortex’s tonotopic organization and the identification of other neuronal response features determined by this cortical zone’s topography. In narcotized ani mals, the response of neurons of the primary cortex to sound, as a rule, appeared only at the moment of the beginning of the signal and has only a feeble ability to reproduce rapid temporal changes. The comparison of the data obtained in different laboratories reveals the essential role of the general state of the object during the registration of the cortex’s impulse activity. In recent years, when significant results were obtained on the auditory cortex neurons of awake rodents and primates, an apparent deficiency of such data was revealed precisely for such a seemingly studied object as the cat’s cortex’s primary zone.

Key words: primary auditory cortex, cat, coding of features, anesthesia, communication signals

DOI: 10.31857/S0235009221020037

Cite: Bibikov N. G. Funktsionalnoe issledovanie pervichnoi slukhovoi kory koshki [Functional investigations of the primary auditory cortex in the cat]. Sensornye sistemy [Sensory systems]. 2021. V. 35(2). P. 103-134 (in Russian). doi: 10.31857/S0235009221020037

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