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.

The Effect of Different Stimulation Rates on Brainstem Auditory-Evoked-Potential Responses.

 Auditory-evoked potentials are influenced by several factors, including polarity, filter, stimulus intensity and stimulation rate. The presentation of higher rates of stimuli per second enables the collection of a greater number of responses in a given period of time, promoting a shorter testing time; however, the collected recordings are subject to changes related to wave morphology.  To compare the brainstem auditory-evoked-potential responses with click stimulus with the most commonly used stimulation rates in the clinical practice.

Changes in cortical auditory evoked potentials in response to auditory training in elderly hearing aid users: A pilot study.

Objective: To compare the cortical auditory evoked potential responses pre-and post-Auditory Musical Training associated with hearing aid adaptation in elderly people with presbycusis.

Design: This is a pilot, prospective, randomized, single-blind study.

Study Sample: Eight presbiacusis elderly people between 65 and 80 years, new hearing aid users, divided into two groups participated in the study: Hearing Aid Group: use of hearing aid; and Auditory Training Group: use of hearing aid in addition to musical auditory training for 16 sessions.

Masking release in cortical auditory evoked potentials with speech stimulus.

Purpose: To analyze the effect of masking on the Cortical Auditory Evoked Potential with speech stimulus in young adults.

Methods: Fourteen individuals aged between 19 and 28 years of both sexes with no hearing loss participated in the study. The Cortical Auditory Evoked Potential examination was performed with synthetic speech stimulus /ba/ simultaneous to Speech Shaped Noise presented under three conditions: steady noise with a 30 dB SPLep intensity (weak steady noise), steady noise with a 65 dB SPLep intensity o (strong steady noise) and modulated noise with 30 dB SPLep and 65 dB SPLep intensities at 25Hz and modulation period of 40 ms.

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.

Cognitive performance and long-latency auditory evoked potentials: a study on aging.

Objective: To evaluate the relationship between cognitive performance and long-latency auditory evoked potentials in an elderly population.

Methods: The sample consisted of adults between 20 and 58 years of age and elderly adults between 60 and 70 years of age. The screening procedures adopted were an inspection of the external auditory canal, tonal and vocal audiometry, tympanometry, brain stem auditory evoked potential, the Montreal Cognitive Assessment test, and long-latency auditory evoked potential.

Cortical auditory evoked potential in babies and children listeners.

Introduction: Cortical auditory evoked potentials have been increasingly used in research and audiological routines. However, there is a lack of studies with a large number of children who are stratified by age group. These would help clarify the variations in latency and amplitude of cortical auditory evoked potentials, and thus help establish reference values in children of different ages.

Influence of speech-language therapy on P300 outcome in patients with language disorders: a meta-analysis.

Introduction: The patient's evolution in the audiology and speech-language clinic acts as a motivator of the therapeutic process, contributing to patient adherence to the treatment and allowing the therapist to review and/or maintain their clinical therapeutic conducts. Electrophysiological measures, such as the P300 evoked potential, help in the evaluation, understanding and monitoring of human communication disorders, thus facilitating the prognosis definition in each case.

Objective: To determine whether the audiology and speech-language therapy influences the variation of P300 latency and amplitude in patients with speech disorders undergoing speech therapy.

Interaction Between Cortical Auditory Processing and Vagal Regulation of Heart Rate in Language Tasks: A Randomized, Prospective, Observational, Analytical and Cross-Sectional Study.

Cortical auditory evoked potentials (CAEP) throughout a language task is beneficial during psychophysiological evaluation to advance identification of language disorders. So as to better comprehend human communication and to provide additional elements for neuropsychological examinations we aimed to (1) examine the influence of language tasks on cortical auditory processing and vagal control of heart rate and (2) to verify a possible association between the parasympathetic cardiac regulation and cortical auditory processing in language tasks. This study was completed with 49 women.

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.

A relationship between brainstem auditory evoked potential and vagal control of heart rate in adult women.

Numerous studies have investigated the connection between autonomic control of heart rate (HR) and auditory stimulus. Yet, the literature lacks evidence of a close association between auditory brainstem processing and HR autonomic control. We aimed to evaluate and verify the relationship between auditory brainstem response (ABR) and HR variability (HRV) in healthy women.

Association between heart rhythm and cortical sound processing.

Sound signal processing signifies an important factor for human conscious communication and it may be assessed through cortical auditory evoked potentials (CAEP). Heart rate variability (HRV) provides information about heart rate autonomic regulation. We investigated the association between resting HRV and CAEP.

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.

Auditory Alterations in Children Infected by Human Immunodeficiency Virus Verified Through Auditory Processing Test.

 The auditory system of HIV-positive children may have deficits at various levels, such as the high incidence of problems in the middle ear that can cause hearing loss.  The objective of this study is to characterize the development of children infected by the Human Immunodeficiency Virus (HIV) in the Simplified Auditory Processing Test (SAPT) and the Staggered Spondaic Word Test.  We performed behavioral tests composed of the Simplified Auditory Processing Test and the Portuguese version of the Staggered Spondaic Word Test (SSW).

Variables in P300 recording: task type and electrode position.

Purpose: To analyze the latency and amplitude of P300 responses obtained with electrodes positioned at Cz and Fz and in different tasks of infrequent stimulus identification in normal hearing individuals.

Methods: Forty adults of both genders participated in the study. Three recordings with three different tasks were obtained for the identification of the infrequent stimulus; simultaneous recordings were obtained from Cz and Fz positions.

Neonatal hearing screening in a low-risk maternity in São Paulo state.

Introduction: The literature indicates that neonatal hearing screening should be universal, so a description of programs that adopt this recommendation is relevant.

Objective: To describe the results of newborn hearing screening and the profile of mothers and newborns attended to in a low-risk maternity setting, and to correlate the characteristics of this population with the results of transient evoked otoacoustic emissions.

Methods: A contemporary cross-sectional cohort study.

Auditory evoked potential: a proposal for further evaluation in children with learning disabilities.

The information presented in this paper demonstrates the author's experience in previews cross-sectional studies conducted in Brazil, in comparison with the current literature. Over the last 10 years, auditory evoked potential (AEP) has been used in children with learning disabilities. This method is critical to analyze the quality of the processing in time and indicates the specific neural demands and circuits of the sensorial and cognitive process in this clinical population.

P300 in individuals with sensorineural hearing loss.

Introduction: Behavioral and electrophysiological auditory evaluations contribute to the understanding of the auditory system and of the process of intervention.

Objective: To study P300 in subjects with severe or profound sensorineural hearing loss.

Methods: This was a descriptive cross-sectional prospective study.

Vocal complaint in physical education teachers and its association with the cardiovascular system.

Background: We examined the vocal complaints and evaluated the correlation between the vocal handicap index (VHI) and heart rate variability (HRV) in physical education teachers. We evaluated 46 teachers.

Method: The subjects were investigated regarding voice complaint and the VHI was applied.

Cognitive potential of children with attention deficit and hyperactivity disorder.

Unlabelled: The literature has described comorbidities among the symptoms of children with Attention Deficit and Hyperactivity Disorder (ADHD) and the auditory processing changes, and these symptoms have been overlooked in the assessment, and consequently, on the rehabilitation of these individuals.

Objective: To compare the findings of the long latency auditory evoked potentials in children with and without ADHD.

Method: This is a historical cohort cross-sectional case-control study, in which we enrolled 30 children with and without ADHD, aged 8-12 years.

Auditory stimulation and cardiac autonomic regulation.

Previous studies have already demonstrated that auditory stimulation with music influences the cardiovascular system. In this study, we described the relationship between musical auditory stimulation and heart rate variability. Searches were performed with the Medline, SciELO, Lilacs and Cochrane databases using the following keywords: "auditory stimulation", "autonomic nervous system", "music" and "heart rate variability".

Auditory middle latency response in children with learning difficulties.

Introduction:  This is an objective laboratory assessment of the central auditory systems of children with learning disabilities.

Aim:  To examine and determine the properties of the components of the Auditory Middle Latency Response in a sample of children with learning disabilities.

Methods:  This was a prospective, cross-sectional cohort study with quantitative, descriptive, and exploratory outcomes.

Prevalence of tinnitus in workers exposed to noise and organophosphates.

Introduction:  Research on the workplace has emphasized the effects of noise exposure on workers' hearing, but has not considered the effects of agrochemicals.

Aim:  To evaluate and correlate the hearing level and tinnitus of workers exposed simultaneously to noise and organophosphates in their workplace and to measure tinnitus distress on their quality of life.

Method:  A retrospective clinical study.