All under a dichotic listening condition.Ī standard dichotic listening test consists of a relatively high number of dichotic syllables. It then happens that, if there’s an injury in any of the cerebral hemispheres, one can observe a deficit in the ear contralateral to the injury. Thus, the information received in one ear passes exclusively to the opposite cerebral hemisphere. During dichotic listening, the ipsilateral pathways inhibit. Thus, the information received by each ear projects on both cerebral hemispheres. In this technique, the projections of the auditory pathway to the motor cortex are ipsilateral and contralateral. In addition, other parameters might vary, such as the interval between and within stimuli, and the number of presentations and intensity. The stimuli presented can vary from words to syllables, to letters, and even to musical sounds. What exactly is dichotic listening?ĭichotic listening is a technique based on the simultaneous presentation of two different auditory stimuli, one in each ear. Meanwhile, the right hemisphere is responsible for visuospatial processing, the perception of objects and faces. The left hemisphere specializes in language, and this hemisphere is responsible for grammatical processing and speech. That’s the relative predominance of one hemisphere or another for certain cognitive functions. This technique is used during research on functional hemispheric specialization. Dichotic listening is a behavioral technique based on perceptual laterality that’s commonly used in neuropsychology.
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