OBJECTIVE To study objectively auditory temporal processing in a group of normal hearing subjects and in a group of hearing-impaired individuals with auditory neuropathy (AN) using electrophysiological and psychoacoustic methods. METHODS Scalp recorded evoked potentials were measured to brief silent intervals (gaps) varying between 2 and 50ms embedded in continuous noise. Latencies and amplit...

A 73-year-old man developed a fulminant form of Guillain-Barrd syndrome with abolition of brainstem reflexes. Antibodies to GQ1b were positive (1:180). The clinical findings mimicked a "brain death" pattern for a period of 12 days. In contrast, the EEG showed remaining cerebral electrical activity. Brainstem auditory evoked potentials, long-latency auditory potentials and flash-evoked visual po...

INTRODUCTION The evaluation of Cortical Auditory Evoked Potential has been the focus of scientific studies in infants. Some authors have reported that automated response detection is effective in exploring these potentials in infants, but few have reported their efficacy in the search for thresholds. OBJECTIVE To analyze the latency, amplitude and thresholds of Cortical Auditory Evoked Potent...

OBJECTIVE To evaluate the frequency and degree of severity of abnormalities in the auditory pathways in patients with Chiari malformations type I and II. METHOD This is a series-of-case descriptive study in which the possible presence of auditory pathways abnormalities in 75 patients (48 children and 27 adults) with Chiari malformation types I and II were analyzed by means of auditory evoked ...