THE ROLE OF THE AUDITORY-CORTEX IN THE FORMATION OF CONDITIONED REFLEXES TO AMPLITUDE-MODULATED STIMULI IN RATS

  • 1 January 1981
    • journal article
    • research article
    • Vol. 31  (2) , 284-291
Abstract
Motor alimentary conditioned reflexes to acoustic stimuli were elaborated in 27 laboratory rats. After bilateral ablation of the auditory cortex, differentiation of tonal stimuli from amplitude-modulated (AM) signals with a 5 c/s modulation frequency was completely abolished, without its subsequent restoration in 6 mo. after the operation. Differentiation of tonal from AM-stimuli with a 50 and 500 c/s modulation frequency not only persists, but is elaborated in animals with a preliminarily ablated auditory cortex. Results of the investigation suggest that the auditory cortex is the center where the coding of stimuli with a low frequency of amplitude modulation is completed. Correspondingly, the structural organization of the sensory part of the arc of conditioned responses to different classes of AM-stimuli is discussed.

This publication has 1 reference indexed in Scilit: