A review of the literature on the impact of acute and chronic stress upon brain waves.

Annals of Psychophysiology

Shamoon Noushad¹  Yusra Saleem²  Basit Ansari³  Syeda Farah Batool⁴  S. Farah Batool⁵  Sadaf Ahmed⁵ 

[1] 1 Department of Health, Physical Education and Sports Sciences, University of Karachi, Karachi-Pakistan. 2 Department of Public Health, Malir University of Science and Technology, Karachi-Pakistan.;1 Physchophysiology Research Lab, MAHQ-Biological research Centre-University of Karachi, Karachi-Pakistan. 2 Department of Public Health, Malir University of Science and Technology, Karachi-Pakistan/;Department of Health, Physical Education and Sports Sciences, University of Karachi, Karachi-Pakistan.;Department of Psychology, Malir University of Science and Technology, Karachi-Pakistan.;Physchophysiology Research Lab, MAHQ-Biological research Centre-University of Karachi, Karachi-Pakistan.;

关键词: chronic stress;    acute stress;    brain waves;    electroencephalography;   

DOI  :  10.29052/2412-3188.v8.i1.2021.49-61

来源: DOAJ

【 摘 要 】

Background:The biological responses associated with stress originate in the brain and involvedifferent physiological and physical effects. The direct effect of stress on cortical responses can be visualized by recording the brain’s electrical waves using an encephalograph. These waves are recorded by means of an electroencephalogram(EEG).EEGisthemostcommonlyusedneuroimaging technique to study the patterns of brainwaves and functioning of the brain. It also measuresthevariationoftheelectricfieldproducedbyneuronalactivitya millisecond at a time. To systematically analyze publishedstudies on the differencebetweenbrainwavepatternsintermsoftheirfrequenciesamong subjects with acute stress, chronic stress, and normal individuals.Methodology:The data from published studies was arranged quantitatively and qualitatively by producing a planned summary measure. Studies that focused on brain wave analysis of the EEG of healthy adult subjects with no history of mental illness or head injury were included in the review. The selected literature included manytypesofstressorsthatareacuteorchronic,andthataffectedtheneuronal electrical activity. The only electronic database utilized to identify relevant studies was PubMed. Result:Fifteenstudieswereincludedthatwerebasedonavarietyofacute stressorstoobservealterationsinbrainwaveactivitybetweenstress-freeand stressed states. These studies showed that stressors could be a causative factor to generate fluctuations in neuronal oscillationsthat also leads to significant psychological, physiological and neurobiological deteriorations to some extent.An additional sixteen studies were included, which showed the effect of chronic stress on the asymmetry of the amplitude in the frequencies of brain waves.Conclusion:The most common change observed was in the alpha frequency (8-13Hz), followed by changes in beta waves (13-30 Hz) and theta (4-8Hz). Though, thereisnotalwaysthesameresultantpatternofwavesexploredwitheventhe sametypeofstressorsduetointerpersonaldifferencesinresponsetoastressful situation.

【 授权许可】

Unknown