Introduction: Since of the first registration of cerebral electric activities (EEG) in response to the presentation hearing stimulus in human, decade 30‘s, can be observed the late components or long latency auditory evoked potentials - LLAEP (Mendel, 1989). Ever since, a lot of number of researches have been performed emphasizing the study of the hearing system (the ear and central structures). Considering the functional differences among the cerebral hemispheres, the present study pretend to identify electrophysiologicals evidences to verify differences between hemispheres. Objective: The main objective was to verify the occurrence of possible differences among the captured potentials of the hemispheres right (Cz/A2) and left (Cz/A1) in a group of normal listeners between 8 and 18 years old. Study design: For so much, a comparative analysis of the registrations of LLAEP was performed, as for the latency as the amplitude. Results: Statistical significants differences were not observed among the measures of the derivations Cz/A1 and Cz/A2, except for the component P2 in the masculine population. However, the functional difference between the hemispheres cannot deny, and this should be considered that variable during the performance of the LLAEP‘s research. Conclusion: Future works will still be necessary, with larger populations or even with different positions of electrodes so that we can verify existence or not of electrophysiologicals evidences that identify those differences, making sure and efficients application of this method.
long latency auditory evoked potential; event-related evoked potential; cerebral hemispheres
