Perception of dichotic chords by normal and commisurotomized human subjects.
A perceptual suppression of an ipsilateral by a concurrent contralateral auditory signal occurs in commissurotomized subjects and probably in normal subjects. This suppression of the ipsilateral signal depends on the nature of the auditory stimuli. For dichotic speech sounds the suppression of the ipsilateral signal is overwhelming; for dichotically presented pure tones it is not present. For dichotically presented pure tones, unlike speech signals, a subcortical central pitch processor determines the contribution to the perceptual experience of the right and left ear signals in both normal as well as commissurotomized subjects.
Efron
R
R
Neurophysiology Biophysics Research Laboratory, Veterans Administration Hospital, Martinez, California 94553, USA.
Bogen
J E
JE
Yund
E W
EW
D000161:Acoustic Stimulation; D000328:Adult; D002648:Child; D004007:Dichotic Listening Tests; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D038421:Hemispherectomy / Q000523:psychology*; D006801:Humans; D011594:Psychometrics