PMID- 34003701 OWN - NLM STAT- MEDLINE DCOM- 20210520 LR - 20210520 IS - 2169-5202 (Electronic) IS - 1550-0594 (Linking) VI - 52 IP - 4 DP - 2021 Jul TI - Short-Term Impact of Sleep Apnea/Hypopnea on the Interaction Between Various Cortical Areas. PG - 296-306 LID - 10.1177/1550059420965441 [doi] AB - INTRODUCTION: Sleep apnea/hypopnea syndrome (SAHS) can change brain structure and function. These alterations are related to respiratory event-induced abnormal sleep, however, how brain activity changes during these events is less well understood. METHODS: To study information content and interaction among various cortical regions, we analyzed the variations of permutation entropy (PeEn) and symbolic transfer entropy (STE) of electroencephalography (EEG) activity during respiratory events. In this study, 57 patients with moderate SAHS were enrolled, including 2804 respiratory events. The events terminated with cortical arousal were independently researched. RESULTS: PeEn and STE were lower during apnea/hypopnea, and most of the brain interaction was higher after apnea/hypopnea termination than that before apnea in N2 stage. As indicated by STE, the respiratory events also affected the stability of information transmission mode. In N1, N2, and rapid eye movement (REM) stages, the information flow direction was posterior-to-anterior, but the anterior-to-posterior increased relatively during apnea/hypopnea. The above EEG activity trends maintained in events with cortical arousal. CONCLUSIONS: These results may be related to the intermittent hypoxia during apnea and the cortical response. Furthermore, increased frontal information outflow, which was related to the compensatory activation of frontal neurons, may associate with cognitive function. FAU - Zhou, Guo-Lin AU - Zhou GL AD - School of Biomedical Engineering, 26469Sun Yat-Sen University, Guangzhou, China. FAU - Pan, Yu AU - Pan Y AD - School of Biomedical Engineering, 26469Sun Yat-Sen University, Guangzhou, China. FAU - Liao, Yuan-Yuan AU - Liao YY AD - School of Biomedical Engineering, 26469Sun Yat-Sen University, Guangzhou, China. FAU - Liang, Jiu-Xing AU - Liang JX AD - Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Center for Studies of Psychological Application, 12451South China Normal University, Guangzhou, China. FAU - Zhang, Xiang-Min AU - Zhang XM AD - 373651Sleep-Disordered Breathing Center of the 6th Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China. FAU - Luo, Yu-Xi AU - Luo YX AUID- ORCID: 0000-0003-3133-0064 AD - School of Biomedical Engineering, 26469Sun Yat-Sen University, Guangzhou, China. AD - Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Sun Yat-Sen University, Guangzhou, China. LA - eng PT - Journal Article DEP - 20201014 PL - United States TA - Clin EEG Neurosci JT - Clinical EEG and neuroscience JID - 101213033 SB - IM MH - Electroencephalography MH - Humans MH - Polysomnography MH - Sleep MH - *Sleep Apnea Syndromes MH - *Sleep Stages OTO - NOTNLM OT - EEG OT - cortical activity OT - permutation entropy OT - sleep apnea hypopnea syndrome OT - symbolic transfer entropy EDAT- 2021/05/19 06:00 MHDA- 2021/05/21 06:00 CRDT- 2021/05/18 17:11 PHST- 2021/05/18 17:11 [entrez] PHST- 2021/05/19 06:00 [pubmed] PHST- 2021/05/21 06:00 [medline] AID - 10.1177/1550059420965441 [doi] PST - ppublish SO - Clin EEG Neurosci. 2021 Jul;52(4):296-306. doi: 10.1177/1550059420965441. Epub 2020 Oct 14.