Study of aged central auditory function using the auditory middle latency response.

Objective: Investigate the auditory function of the elderly using the middle latency potentials.

Methodology: Group 1 (G1): 20 healthy individuals of both genders, older than 60 years, without hearing loss. Group 2 (G2): 20 healthy individuals of both sexes, older than 60 years, with hearing loss in frequencies from 4 to 8 kHz.

Study of Binaural Auditory Cortical Response in Children with History of Recurrent Otitis.

 Any type of sensory deprivation in childhood resulting from conductive hearing loss may impair the development of peripheral and central auditory pathway structures with negative consequences for binaural processing.  To characterize and compare monoaural and binaural auditory responses in neonates and children without and with a history of recurrent otitis.  The study included participants from 0 to 8 years and 11 months old, in good general health conditions, of both genders, divided into a control group, with no history of otitis, and a study group, with history of recurrent otitis.

Analysis of the Effect of Musical Stimulation on Cortical Auditory Evoked Potentials.

 Cortical auditory evoked potentials (CAEPs) are bioelectric responses that occur from acoustic stimulations, and they assess the functionality of the central auditory system.  The objective of the present study was to analyze the effect of musical stimulation on CAEPs.  The sample consisted of 42 healthy female subjects, aged between 18 and 24 years, divided into two groups - G1: without musical stimulation prior to the CAEP examination; and G2: with stimulation prior to the examination.

P300: Waves Identification with and without Subtraction of Traces.

 The P300 test requires well-defined and unique criteria, in addition to training for the examiners, for a uniform analysis of studies and to avoid variations and errors in the interpretation of measurement results.  The objective of this study is to verify whether there are differences in P300 with and without subtraction of traces of standard and nonstandard stimuli.  We conducted this study in collaboration with two research electrophysiology laboratories.