DICHOTIC LISTENING SIDE OF BRAIN INJURY AND CEREBRAL DOMINANCE

This study investigated the interaction between the side of a unilateral brain lesion and the class of stimulus used in dichotic presentation. Subjects wre 10 right-brain injured and 10 left-brain injured (aphasic) patients and 10 normal control subjects. Dichotic materials were digits (assumed to be under left hemisphere control), tonal sequences (under right hemisphere control), and clicks which proved to be non-lateralized. Injury to the hemisphere dominant for a given material produced bilateral deficits specific to that material. Superimposed was the lesion effect" of selectively greater impairment of report from the ear opposite an injured hemisphere. © 1969."