scholarly journals Brainstem Auditory Evoked Potentials in Type 2 Diabetes Mellitus

2021 ◽  
Author(s):  
Rajesh Paluru ◽  
Devendra Singh Negi
Keyword(s):  
Diabetes Mellitus ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Metabolic Diseases ◽  
Auditory Pathway ◽  
Barrier Dysfunction ◽  
Auditory Evoked Response ◽  
Chronic Hyperglycaemia ◽  
Central Neuropathy

Diabetes mellitus is a group of metabolic diseases characterized by hyperglycaemia resulting from defects in insulin secretion, insulin action or both. Diabetes affects many systems and produces complications in the human body, in those complications one is diabetic central neuropathy. The pathological mechanisms involved in the central neuropathy include chronic hyperglycaemia, hypoglycaemic episodes, angiopathy and blood–brain barrier dysfunction. Diabetic central neuropathy is detected by using of brainstem auditory evoked response (BAER), Visual evoked potential (VEP), somatosensory evoked potential (SEP). These abnormalities are present at different levels and may appear before appearance of overt complications. The central nervous system abnormalities are more frequent in patients with peripheral neuropathy but evoked potentials can be abnormal even in patients without neuropathy. The BAER is a physiological recording technique to study the auditory pathway and does not require subject’s attention and generates waves during the first 10 ms after the sound stimulus. Each BAER wave is generated by the activation of a sub-cortical component of the auditory pathway with 90% sensitivity and 70–90% of specificity.

scholarly journals Auditory evoked potentials and multiple sclerosis

2010 ◽  
Vol 68 (4) ◽  
pp. 528-534 ◽  
Author(s):  
Carla Gentile Matas ◽  
Sandro Luiz de Andrade Matas ◽  
Caroline Rondina Salzano de Oliveira ◽  
Isabela Crivellaro Gonçalves
Keyword(s):  
Multiple Sclerosis ◽  
Nervous System ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Demyelinating Disease ◽  
Auditory Pathway ◽  
Auditory Brainstem ◽  
Central Nervous System Damage ◽  
Brainstem Response ◽  
And Gender

Multiple sclerosis (MS) is an inflammatory, demyelinating disease that can affect several areas of the central nervous system. Damage along the auditory pathway can alter its integrity significantly. Therefore, it is important to investigate the auditory pathway, from the brainstem to the cortex, in individuals with MS. OBJECTIVE: The aim of this study was to characterize auditory evoked potentials in adults with MS of the remittent-recurrent type. METHOD: The study comprised 25 individuals with MS, between 25 and 55 years, and 25 age- and gender-matched healthy controls (research and control groups). Subjects underwent audiological and electrophysiological evaluations. RESULTS: Statistically significant differences were observed between the groups regarding the results of the auditory brainstem response and the latency of the Na and P300 waves. CONCLUSION: Individuals with MS present abnormalities in auditory evoked potentials indicating dysfunction of different regions of the central auditory nervous system.

scholarly journals Parameters for Applying the Brainstem Auditory Evoked Potential with Speech Stimulus: Systematic Review

2017 ◽  
Vol 22 (04) ◽  
pp. 460-468 ◽  
Author(s):  
Luísa Gabriel ◽  
Luíza Vernier ◽  
Maria Ferreira ◽  
Adriana Silveira ◽  
Márcia Machado
Keyword(s):  
Systematic Review ◽  
Evoked Potentials ◽  
Brain Stem ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Sampling Rate ◽  
Presentation Rate ◽  
Auditory Evoked Potential ◽  
Speech Stimulus ◽  
Brainstem Auditory Evoked Potential

Introduction Studies using the Brainstem Auditory Evoked Potential with speech stimulus are increasing in Brazil, and there are divergences between the methodologies used for testing. Objectives To analyze the parameters used in the study of the Brainstem Auditory Evoked Potentials with speech stimulus. Data Synthesis The survey was performed using electronic databases. The search strategy was as follows: “Evoked potentials, auditory” OR “Brain stem” OR “Evoked potentials, auditory, brain stem” AND “Speech.” The survey was performed from June to July of 2016. The criteria used for including articles in this study were: being written in Portuguese, English or Spanish; presenting the description of the testing parameters and the description of the sample. In the databases selected, 2,384 articles were found, and 43 articles met all of the inclusion criteria. The predominance of the following parameters was observed to achieve the potential during study: stimulation with the syllable /da/; monaural presentation with greater use of the right ear; intensity of 80 dB SPL; vertical placement of electrodes; use of in-ear headphones; patient seated, distracted in awake state; alternating polarity; use of speech synthesizer software for the elaboration of stimuli; presentation rate of 10.9/s; and sampling rate of 20 kHz. Conclusions The theme addressed in this systematic review is relatively recent. However, the results are significant enough to encourage the use of the procedure in clinical practice and advise clinicians about the most used procedures in each parameter.

Classification and diagnosis of diabetes mellitus

2011 ◽  
pp. 1703-1711 ◽  
Author(s):  
K. George M.M. Alberti ◽  
Paul Zimmet
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Secretion ◽  
Protein Metabolism ◽  
Insulin Action ◽  
Metabolic Diseases ◽  
Macrovascular Disease ◽  
Microvascular Damage ◽  
Increased Risk ◽  
Chronic Hyperglycaemia ◽  
Diagnosis Of Diabetes Mellitus

Diabetes mellitus is a group of metabolic diseases of multiple aetiologies characterized by hyperglycaemia together with disturbances of carbohydrate, fat, and protein metabolism resulting from defects in insulin secretion, insulin action, or both. The chronic hyperglycaemia of diabetes is associated with microvascular damage affecting, particularly, eyes, kidneys, nerves, and heart, together with an increased risk of macrovascular disease (1).

Auditory Evoked Potentials in Audiometric Assessment of Compensation and Medicolegal Patients

1986 ◽  
Vol 95 (5) ◽  
pp. 514-519 ◽  
Author(s):  
Martyn Hyde ◽  
Noriaki Matsumoto ◽  
Peter Alberti ◽  
Yao-Li Li
Keyword(s):  
Evoked Potentials ◽  
Pure Tone ◽  
Clinical Utility ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Pure Tone Audiogram ◽  
Middle Latency Response ◽  
Widespread Implementation ◽  
Latency Response ◽  
Almost All

The clinical utility of auditory evoked potentials for validation of the pure tone audiogram in adult compensation claimants and medicolegal patients is examined. Large sample comparisons of evoked potential and conventional pure tone thresholds showed that the slow vertex response can estimate true hearing levels within 10 dB in almost all patients. Given adequate tester skills, it is the tool of choice, and it merits more widespread implementation. Properly used, it can improve and abbreviate the assessment battery for detection and quantification of nonorganic hearing loss. The 40-Hz middle latency response is useful as a secondary tool, but at present, cochlear nerve and brain stem potentials have limited audiometric value in this population.

High-frequency Components of Auditory Evoked Potentials Are Detected in Responsive but Not in Unconscious Patients

2005 ◽  
Vol 103 (5) ◽  
pp. 944-950 ◽  
Author(s):  
Bertram Scheller ◽  
Gerhard Schneider ◽  
Michael Daunderer ◽  
Eberhard F. Kochs ◽  
Bernhard Zwissler
Keyword(s):  
Evoked Potentials ◽  
General Anesthesia ◽  
High Frequency ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
General Anesthetics ◽  
Frequency Bands ◽  
Time Frequency ◽  
Frequency Components

Background The dose-dependent suppression of midlatency auditory evoked potentials by general anesthetics has been proposed to measure depth of anesthesia. In this study, perioperatively recorded midlatency auditory evoked potentials were analyzed in a time-frequency space to identify significant changes induced by general anesthesia. Methods Perioperatively recorded auditory evoked potentials of 19 patients, recorded at varying levels of anesthesia, were submitted to a multiscale analysis using the wavelet analysis. Energy contents of the signal were calculated in frequency bands 0-57.1 Hz, 57.1-114.3 Hz, 114.3-228.6 Hz, and 228.6-457.1 Hz. A Friedman test and a Dunn multiple comparisons test were performed to identify significant differences. Results Statistical evaluation showed a highly significant decrease of the wavelet energies for the frequency bands 57.1-114.3 Hz (P < 0.0001), 114.3-228.6 Hz (P < 0.0001), and 228.6-457.1 Hz (P < 0.0001) for the measuring points representing deep general anesthesia. This decrease is accompanied by a decrease in the wavelet energy of the frequency band 0-57.1 Hz of no statistical significance (P = 0.021) (level of significance set to P = 0.01). The changes are most prominent in the poststimulus interval between 10 and 30 ms. Conclusions This study describes the presence of high-frequency components of the auditory evoked potential. The amount of these components is higher during responsiveness when compared to unconsciousness. Temporal localization of the high-frequency components within the auditory evoked potential shows that they represent a response to the auditory stimulus. Further studies are required to identify the source of these high-frequency components.

scholarly journals Abnormalities in auditory evoked potentials of 75 patients with Arnold-Chiari malformations types I and II

2006 ◽  
Vol 64 (3a) ◽  
pp. 619-623 ◽  
Author(s):  
Paulo Sergio A. Henriques Filho ◽  
Riccardo Pratesi
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Amplitude Ratio ◽  
Auditory Evoked Potential ◽  
Type I ◽  
Auditory Pathways ◽  
Degree Of Severity ◽  
Chiari Malformations

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 potentials evaluation. The analysis was based on the determination of intervals among potentials peak values, absolute latency and amplitude ratio among potentials V and I. RESULTS: Among the 75 patients studied, 27 (36%) disclosed Arnold-Chiari malformations type I and 48 (64%) showed Arnold-Chiari malformations type II. Fifty-three (71%) of these patients showed some degree of auditory evoked potential abnormalities. Tests were normal in the remaining 22 (29%) patients. CONCLUSION: Auditory evoked potentials testing can be considered a valuable instrument for diagnosis and evaluation of brain stem functional abnormalities in patients with Arnold-Chiari malformations type I and II. The determination of the presence and degree of severity of these abnormalities can be contributory to the prevention of further handicaps in these patients either through physical therapy or by means of precocious corrective surgical intervention.

P127: Brainstem auditory evoked potentials in type 2 diabetes mellitus

2014 ◽  
Vol 125 ◽  
pp. S82
Author(s):  
U. Bhattarai ◽  
B.H. Paudel ◽  
N. Limbu ◽  
D. Thakur ◽  
S. Sharma ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Brainstem Auditory Evoked Potentials

scholarly journals Changes in brainstem auditory evoked potentials among North Indian females with Type 2 diabetes mellitus

2013 ◽  
Vol 17 (6) ◽  
pp. 1018 ◽  
Author(s):  
Sharat Gupta ◽  
Shallu Mittal ◽  
Avnish Kumar ◽  
KamalDev Singh ◽  
Raghuvansh Sharma ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Brainstem Auditory Evoked Potentials

USE OF MULTILAYER PERCEPTRON FOR RECOGNITION OF EVOKED POTENTIALS

1990 ◽  
Vol 04 (04) ◽  
pp. 705-716 ◽  
Author(s):  
I. BRUHA ◽  
G.P. MADHAVAN ◽  
M.S.-K. CHONG
Keyword(s):  
Pattern Recognition ◽  
Evoked Potentials ◽  
Brain Stem ◽  
Multilayer Perceptron ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Recognition System ◽  
Pattern Recognition Problem ◽  
Potential Waveform ◽  
Attributed Grammars

A recognition system consisting of attributed grammars and a two-layer perceptron for classifying brain-stem auditory evoked potentials is described. An evoked potential waveform is filtered and converted to a string of terminal symbols. This string is then processed by a regular attributed grammar. Its semantic functions return a list of numeric features that are further processed by a two-layer perceptron. The paper discusses the results of a large number of experiments that have been conducted to obtain the performance characteristics of a multilayer perceptron on a specified pattern recognition problem.

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