Asymmetrical Electroencephalographic Change of Human Brain During Sleep Onset Period

• 발행기관: 대한신경정신의학회
• 저자명: DooHeum Park ChulJin Shin
• 간행물 정보: 『Psychiatry Investigation』제14권 제6호, 839~843쪽, 전체 5쪽
• 주제분류: 의약학 > 정신과학
• 파일형태: PDF
• 발행일자: 2017.11.30

영문 초록

ObjectiveaaHuman cerebral hemisphere is known to function asymmetrically with daytime left hemisphere superiority in most right-handed persons. It may have relevance to the localization of specific function of the brain. This study attempted to reveal whether the functional cerebral asymmetry in the wakeful state is still maintained throughout the sleep onset period. Methods-Thirty-channel EEG was recorded in 61 healthy subjects. The EEG power spectra of each of the seven frequencies were compared between the two kinds of 30-second states; the wakeful stage and the late-sleep stage 1. Results-The asymmetrical indices of sleep stage 1 at several fronto-central leads were decreased in the delta, theta, alpha-2, and all beta bands. Conversely, at parts of parieto-occipital leads showed an increase in the indices of the theta, alphas, beta-1, and beta-2 bands. Any fronto-central leads did not show an increase in the index, and no parieto-occipital leads showed a decrease. Conclusion-During the sleep onset period, power spectral asymmetry of the brain showed a different pattern from the wakeful stage. This asymmetrical pattern of EEG powers may suggest a reversal of the left hemispheric dominance during sleep.

목차

INTRODUCTION

METHODS

RESULTS

DISCUSSION

ACKNOWLEDGEMENTS

REFERENCES

키워드

Cerebral asymmetry Sleep onset period EEG spectra