[Electrophysiologic manifestations of the functional organization of the inferior colliculi of cats during binaural stimulation with different tonal signals with interaural phase differences].
The maximal activity of the inferior colliculus studied with frequency following responses was mainly observed at interaural phase differences delta phi of 180 degrees, the minimal activity at delta phi = 135-180 degrees (with contralateral delay), and the maximal asymmetry of the activity occurred mainly at delta gamma of 90-135 degrees. These values are statistically independent of both the stimulus frequency and electrode location within the inferior colliculus. These findings support observations on single unit activity and are considered as possible basis for relative estimation by the auditory system of the degree of the sound source shift from the head midline, in addition to the absolute estimation on the basis of the characteristic delay mechanism. The data obtained allow to suggest possible neurophysiological mechanisms underlying some psychophysiological phenomena concerning the shift of the fused auditory image.
D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping; D002415:Cats; D004007:Dichotic Listening Tests; D004594:Electrophysiology; D007245:Inferior Colliculi / Q000502:physiology*
Elektrofiziologicheskie proiavleniia funktsional'noĭ organizatsii zadnikh kholmov koshki pri binaural'noĭ stimuliatsii tonal'nymi signalami s interaural'nymi razlichiiami po faze.