Effects of complex tonal stimuli on latency and amplitude of a late auditory evoked potential

2016 ◽  
Vol 139 (5) ◽  
pp. 2320-2323
Author(s):  
Charles G. Marx ◽  
Edward L. Goshorn
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Tonal Stimuli

Effects of Discrimination Task Difficulty on N1 and P2 Components of Late Auditory Evoked Potential

2004 ◽  
Vol 15 (06) ◽  
pp. 456-461 ◽  
Author(s):  
Jerry L. Cranford ◽  
Amy K. Rothermel ◽  
Letitia Walker ◽  
Andrew Stuart ◽  
Saravanan Elangovan
Keyword(s):  
Auditory Processing ◽  
Task Difficulty ◽  
Discrimination Task ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Objective Evidence ◽  
Tonal Stimuli ◽  
Competing Speech ◽  
Selective Effects

The present study investigated the question of whether, in healthy young listeners, increases in discrimination task difficulty will alter the amplitude of either the N1 or P2 components of the late auditory evoked potential (LAEP). Using a stimulus oddball procedure, listeners discriminated changes in the frequency of ongoing tonal stimuli. On different test runs, task difficulty was manipulated by decreasing the size of the frequency differences and/or adding competing speech babble to the nontest ear. Both stimulus procedures produced significant decreases in P2 amplitude but had no effects on N1 amplitudes. This finding of selective effects on later rather than earlier occurring components of the LAEP provides objective evidence that some forms of auditory processing are mediated at more central levels of the system.

Electrophysiologic Correlates of Attention versus Distraction in Young and Elderly Listeners

2002 ◽  
Vol 13 (07) ◽  
pp. 383-391 ◽  
Author(s):  
Albert R. De Chicchis ◽  
Michael Carpenter ◽  
Jerry L. Cranford ◽  
Murvin R. Hymel
Keyword(s):  
Selective Attention ◽  
Evoked Potential ◽  
The Elderly ◽  
Auditory Evoked Potential ◽  
Competition Effect ◽  
Specific Target ◽  
Attention Effect ◽  
Competition Effects ◽  
Significant Attention ◽  
Versus Stimulus

This study examined the effects of selective attention versus stimulus competition on the late auditory evoked potential (LAEP) in 20 young and 20 elderly listeners. In a series of test runs, different oddball tonal sequences were presented to one or both ears, and listeners were instructed to attend to tones at a specific target ear. Peak amplitudes were recorded for the N1, P2, and the early and late N2 components of the LAEP. Significant attention effects were found for all four components. N1 amplitudes increased significantly when participants attended to the target stimuli, whereas the amplitudes of P2, N2e, and N2l decreased. For all LAEP components except N2l, the attention effect did not differ between young and elderly listeners. Significant competition effects also were found for all four components. Amplitudes were significantly larger in monaural than binaural conditions for all components except N2l. The magnitude of this competition effect also was significantly larger for the young listeners than the elderly for all components except N1. These results suggest that the ability to attend selectively to sounds may be more resistant to normal aging than are effects related to stimulus competition.

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.

The effects of frontal and temporal-parietal lesions on the auditory evoked potential in man

1980 ◽  
Vol 50 (1-2) ◽  
pp. 112-124 ◽  
Author(s):  
Robert T. Knight ◽  
Steven A. Hillyard ◽  
David L. Woods ◽  
Helen J. Neville
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential

Reduced p200 latency and allusive thinking: An auditory evoked potential index of a cognitive predisposition to schizophrenia?

1986 ◽  
Vol 30 (3) ◽  
pp. 173-179 ◽  
Author(s):  
Stanley V. Catts ◽  
Michael S. Armstrong ◽  
Philip B. Ward ◽  
Neil McConaghy
Keyword(s):  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Potential Index
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