scholarly journals Automated analysis of bone-conduction cortical auditory evoked potential in normal-hearing neonates

2019 ◽  
Author(s):  
Daniela Soares de Brito ◽  
Alessandra Spada Durante
Keyword(s):  
Evoked Potential ◽  
Bone Conduction ◽  
Automated Analysis ◽  
Normal Hearing ◽  
Auditory Evoked Potential ◽  
Cortical Auditory Evoked Potential

scholarly journals Normal hearing young adults with mild tinnitus: Reduced inhibition as measured through sensory gating

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Julia Campbell ◽  
Connor Bean ◽  
Alison LaBrec
Keyword(s):  
Young Adults ◽  
Evoked Potential ◽  
Sensory Gating ◽  
Normal Hearing ◽  
Auditory Evoked Potential ◽  
Tinnitus Severity ◽  
Hearing Thresholds ◽  
Central Inhibition ◽  
Low Amplitude ◽  
Cortical Auditory Evoked Potential

Decreased central inhibition, possibly related to hearing loss, may contribute to chronic tinnitus. However, many individuals with normal hearing thresholds report tinnitus, suggesting that the percept in this population may arise from sources other than peripheral deafferentation. One measure of inhibition is sensory gating. Sensory gating involves the suppression of non-novel input, and is measured through cortical auditory evoked potential (CAEP) responses to paired stimuli. In typical gating function, amplitude suppression is observed in the second CAEP response when compared to the first CAEP response, illustrating inhibitory activity. Using this measure, we investigated central inhibitory processes in normal hearing young adults with and without mild tinnitus to determine whether inhibition may be a contributing factor to the tinnitus percept. Results showed that gating function was impaired in the tinnitus group, with the CAEP Pa component significantly correlated with tinnitus severity. Further exploratory analyses were conducted to evaluate variability in gating function within the tinnitus group, and findings showed that high CAEP amplitude suppressors demonstrated gating performance comparable to adults without tinnitus, while low amplitude suppressors exhibited atypical gating function.

scholarly journals The effect of early versus late lipid infusion in parenteral nutrition on the biochemical and cortical auditory evoked potential parameters in preterm neonates

2019 ◽  
Vol 67 (1) ◽  
Author(s):  
Rania Mohamed Abdou ◽  
Hoda Mahmoud Ibrahim Weheiba
Keyword(s):  
Weight Gain ◽  
Parenteral Nutrition ◽  
Biochemical Parameters ◽  
Evoked Potential ◽  
Demographic Data ◽  
Auditory Evoked Potential ◽  
Preterm Neonates ◽  
Lipid Infusion ◽  
Significant Difference ◽  
Cortical Auditory Evoked Potential

Abstract Background As brain activity depends greatly on the functions provided by lipid membranes, dietary fat in early life can affect the developing nervous system. Despite the adoption of an early more aggressive parenteral nutrition approach with amino acid infusions still reluctance to the early use of intravenous lipids in neonates. Aim To compare the effect of delayed versus early introduction of intravenous lipid in preterm on the biochemical parameters and on brain development by the cortical auditory evoked potential (CAEP) latency and amplitude. Methods This is a comparative study included 49 neonates admitted at the ain shams university NICUs. Participants were divided into two groups: 26 in group of early lipid infusion and 23 in late lipid infusion, Demographic data, and biochemical parameters were documented during the 1st 2 weeks of life. The CAEP was performed at age of 6 months. The latency and amplitude of P1 were recorded and compared between both groups. Results In the present work we found that group of early lipid infusion had reach their full oral intake earlier with shorter duration of parenteral nutrition and length of stay. They had better weight gain and significantly better glucose level control than group of late lipid infusion. There was no significant difference in the other chemical parameters between both groups expect for the higher incidence of cholestasis in the group of late lipid infusion. At 6 months of age, the group of early lipid infusion had significantly shorter latency and amplitude of P1 than the group of late lipid infusion. Conclusion Early effective nutrition positively affect feeding tolerance and weight gain and maturation of higher brain centers brain.

Cellular generators of the cortical auditory evoked potential initial component

1992 ◽  
Vol 84 (2) ◽  
pp. 196-200 ◽  
Author(s):  
Mitchell Steinschneider ◽  
Craig E. Tenke ◽  
Charles E. Schroeder ◽  
Daniel C. Javitt ◽  
Gregory V. Simpson ◽  
...  
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Initial Component ◽  
Cortical Auditory Evoked Potential

Developmental changes in refractoriness of the cortical auditory evoked potential

2005 ◽  
Vol 116 (3) ◽  
pp. 648-657 ◽  
Author(s):  
Phillip M. Gilley ◽  
Anu Sharma ◽  
Michael Dorman ◽  
Kathryn Martin
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Developmental Changes ◽  
Cortical Auditory Evoked Potential

scholarly journals Cortical auditory-evoked potential as a biomarker of central auditory maturation in term and preterm infants during the first 3 months

Clinics ◽  
2021 ◽  
Vol 76 ◽  
Author(s):  
Dayane Domeneghini Didoné ◽  
Lilian Sanches Oliveira ◽  
Alessandra Spada Durante ◽  
Kátia de Almeida ◽  
Michele Vargas Garcia ◽  
...  
Keyword(s):  
Preterm Infants ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Auditory Maturation ◽  
Cortical Auditory Evoked Potential

scholarly journals Mismatch Negativity Occurrence with Verbal and Nonverbal Stimuli in Normal-Hearing Adults

2020 ◽  
Vol 24 (02) ◽  
pp. e182-e190
Author(s):  
Mirtes Brückmann ◽  
Michele Vargas Garcia
Keyword(s):  
Reference Values ◽  
Mismatch Negativity ◽  
Evoked Potential ◽  
Normal Hearing ◽  
Verbal Stimulus ◽  
Auditory Evoked Potential ◽  
High Contrast ◽  
Auditory Event ◽  
Long Latency ◽  
Significant Difference

Abstract Introduction The mismatch negativity (MMN) is a long-latency auditory evoked potential related to a passive elicited auditory event. Objective To verify the occurrence of MMN with different stimuli, to describe reference values in normal-hearing adults with verbal and nonverbal stimuli and to compare them with each other, besides analyzing the latency, area, and amplitude regarding gender and between the ears. Method Normal-hearing individuals, aged between 18 and 59 years old, participated in the study. As inclusion criterion in the study, all of them underwent tone threshold audiometry, logoaudiometry, tympanometry, and the Dichotic Sentence Identification (DSI) test, and later the MMN with 4 different stimuli, being 2 verbal (da/ta and ba/di) and 2 nonverbal stimuli (750/1,000Hz and 750/4,000Hz), which are considered stimuli with low and high contrast. Results A total of 90 individuals composed the sample, being 39 males and 51 females, with an average age of 26.9 years old. In the analysis of the latency, amplitude, and area of the four stimuli between the ears, they were not considered statistically different. There was a significant difference between all of the stimuli in terms of latency, amplitude and area, with the highest latency found in da/ta, and the greatest amplitude and area in ba/di. Regarding gender, there was only difference in the latency of the da/ta stimulus. Conclusion The da/ta and 750/1,000Hz stimuli elicited the most MMN in the population of normal-hearing adults. Among the genders, there was difference only regarding the latency of the verbal stimulus da/ta, and there was no difference between the ears.

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