Purpose:To study the components of long latency auditory evoked potentials and to compare data from these measures in students with and without learning disabilities. Methods: Thirty students, 15 with learning disorder (study group) and 15 typical without learning problems (control group), of both genders, aged 7-14 years, mean age 10 years.

BackgroundThis study was conducted to describe the association between central auditory processing mechanism and the cardiac autonomic regulation.MethodsIt was researched papers on the topic addressed in this study considering the following data bases: Medline, Pubmed, Lilacs, Scopus and Cochrane. The key words were: “auditory stimulation, heart rate, autonomic nervous system and P300”.ResultsThe findings in the literature demonstrated that auditory stimulation influences the autonomic nervous system and has been used in conjunction with other methods. It is considered a promising step in the investigation of therapeutic procedures for rehabilitation and quality of life of several pathologies.ConclusionThe association between auditory stimulation and the level of the cardiac autonomic nervous system has received significant contributions in relation to musical stimuli.

Event-related potentials in clinical research: guidelines for eliciting, recording, and quantifying Mismatch Negativity, P300, and N400Potenciais relacionados a eventos em pesquisa clínica: diretrizes para eliciar, gravar, e quantificar o MMN, P300 e N400 Event-Related Potentials (ERP) refer to electrical responses generated by the thalamus, auditory cortex and cortical association areas and involve discrimination, integration and attention tasks. Furthermore, they consist of a series of positive and negative peaks which take place from 50 ms after the stimulus onset and can be useful in investigating neural mechanisms related to auditory perception (1,2)

The objective of this study was to evaluate the association between rest heart rate (HR) and the components of the auditory evoked-related potentials (ERPs) at rest in women. We investigated 21 healthy female university students between 18 and 24 years old. We performed complete audiological evaluation and measurement of heart rate for 10 minutes at rest (heart rate monitor Polar RS800CX) and performed ERPs analysis (discrepancy in frequency and duration). There was a moderate negative correlation of the N1 and P3a with rest HR and a strong positive correlation of the P2 and N2 components with rest HR. Larger components of the ERP are associated with higher rest HR.

Introduction: Auditory Evoked Potentials are electrical responses that occur in the central auditory pathways, resulting from acoustic stimulation. The use of speech stimuli to elicit the response of these potentials allows to understand information about speech coding and decoding in the central nervous system. Purpose: To compare the Long Latency Auditory Evoked Potential of two different speech stimuli. Methods: Thirty healthy school children of both genders, aged between 8 and 12 years, participated in the study. For the auditory evoked potentials, different speech stimuli were used for the auditory discrimination: Test 1 /ba/ x /da/ and Test 2 /pa/ x /da/. The stimuli were randomly presented: 20% infrequent and 80% frequent. The school children participated in an active auditory task and said [da] to identify the infrequent stimuli. The normality of the data was determined using the Shapiro-Wilk test. To compare the mean with Test 1 and Test 2, stimulation was performed using Student t test. Results: There was a significant difference in P3 latency in the right ear, P2 amplitude in the right ear and P3 amplitude in the left ear. Longer values occurred with stimulus /ba/ x /da/. Conclusion: The responses of long latency auditory evoked potentials vary depending on the stimulus and care in the analysis when using speech stimuli in the evaluation.