The mismatch negativity (MMN) provides a correlate of automatic auditory discrimination in human auditory cortex that is elicited in response to violation of any acoustic regularity. Recently, deviance-related responses were found at much earlier cortical processing stages as reflected by the middle latency response (MLR) of the auditory evoked potential, and even at the level of the auditory b...

CONTEXT AND OBJECTIVE Children and adolescents who live in situations of social vulnerability present a series of health problems. Nonetheless, affirmations that sensory and cognitive abnormalities are present are a matter of controversy. The aim of this study was to investigate aspects to auditory processing, through applying the brainstem auditory evoked potential (BAEP) and behavioral audito...

Cochlear implant surgery is currently the therapy of choice for profoundly deaf patients. However, the functionality of cochlear implants depends on the integrity of the auditory spiral ganglion neurons. This study assesses the combined efficacy of two classes of agents found effective in preventing degeneration of the auditory nerve following deafness, neurotrophic factors, and antioxidants. G...

Background: although clinical use of the click stimulus for the evaluation of brainstem auditory function is widespread, and despite the fact that several researchers use such stimulus in studies involving human hearing, little is known about the auditory processing of complex stimuli such as speech. Aim: to characterize the findings of the Auditory Brainstem Response (ABR) performed with speec...

Infants with auditory neuropathy and possible hearing impairment are being identified at very young ages through the implementation of hearing screening programs. The diagnosis is commonly based on evidence of normal cochlear function but abnormal brainstem function. This lack of normal brainstem function is highly problematic when prescribing amplification in young infants because prescriptive...

Auditory evoked potential responses were recorded in 20 chronic malnourished children in age group 3-6 years and in 20 healthy age and sex matched controls using an 5200 Neuropack plus ( Nihon Koden, Japan) evoked potential recorder. The absolute peak latencies, inter peak latencies and amplitude of waves I-V of brainstem auditory evoked potentials (BAEPs) were analyzed. The mid latency respons...

Auditory brainstem response (ABR) techniques, an electrophysiological far-®eld recording method widely used in clinical evaluation of human hearing, were adapted for ®shes to overcome the major limitations of traditional behavioral and electrophysiological methods (e.g., invasive surgery, lengthy training of ®shes, etc.) used for ®sh hearing research. Responses to clicks and tone bursts of di€e...

UNLABELLED Learning disorders are often magnified by auditory processing disorders (APD). OBJECTIVE This paper aims to verify whether individuals with reading and writing disorders and P300 latencies above the average also present altered Staggered Spondaic Word (SSW) and speech-in-noise test results suggestive of APD. MATERIALS AND METHODS This is a cross-sectional cohort study. Twenty-one...

purpose: to determine the clinical and paraclinical features of multiple sclerosis (ms) in patients presenting for the first time with optic neuritis. methods:  in this descriptive study, 35 patients with clinical evidence of optic neuritis were enrolled. our evaluation included a neurological examination, visual evoked potentials (vep), brainstem-auditory evoked potentials (baep), and brain mr...