Auditory Evoked Response: Meaningfulness of Stimuli and Interhemispheric Asymmetry

Science  18 Feb 1972:
Vol. 175, Issue 4023, pp. 790-792
DOI: 10.1126/science.175.4023.790


Interhemispheric asymmetries of different magnitudes were observed in human cortical auditory evoked responses to speech and sound-effect stimuli. The wave with peak asymmetry occurred 100 milliseconds after signal onset. The amount of asymmetry of the amplitude of this wave was related to the meaningfulness to the subject of the auditory stimulus rather than to the mere use of verbal versus nonverbal materials.