INFLUENCE OF THE SECTION OF BRACHII OF POSTERIOR COLLICULI ON FORMATION OF AUDITORY CONDITIONED REFLEXES TO THE AMPLITUDE-MODULATED STIMULI

  • 1 January 1983
    • journal article
    • research article
    • Vol. 33  (3) , 480-485
Abstract
Elaboration of tonal and amplitude-modulated stimuli differentiation with a frequency modulation of 5 Hz conducted on laboratory rats 5 mo. after section of brachii colliculi proved impossible. The rate of correct reactions did not differ from the probability of random choice during 500 presentations of conditioned stimuli, but significantly differed from the values obtained during differentiation of these signals in rats after control operation. Electrophysiological control showed that while in the control group and in intact animals amplitude-modulated stimuli with frequencies of 1-20 Hz evoked summary potentials in the auditory cortex which synchronized with their modulation frequency, in rats with sectioned brachii colliculi only on- and off-responses were observed. Sensory conditioning to amplitude-modulated stimuli of low frequency is probably achieved only through the participation of specific pathways.

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