Within-night variation in respiratory effort preceding apnea termination and EEG delta power in sleep apnea

1  Department of Medicine, Veterans Affairs Medical Center, Long Beach 90822; University of California, Irvine 92717; and 2  Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90033 We studied the within-night variability of the maximum esophageal pressu...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 1998-10, Vol.85 (4), p.1434-1441
Main Authors: Berry, Richard B, Asyali, Musa A, McNellis, Michael I, Khoo, Michael C. K
Format: Article
Language:English
Subjects:
Activity Cycles
Anatomy & physiology
Biological and medical sciences
Delta Rhythm
Electroencephalography
Humans
Medical sciences
Middle Aged
Non tumoral diseases
Otorhinolaryngology. Stomatology
Regression Analysis
Respiratory Mechanics - physiology
Respiratory system
Sleep Apnea Syndromes - physiopathology
Sleep disorders
Sleep Stages - physiology
Sleep, REM - physiology
Upper respiratory tract, upper alimentary tract, paranasal sinuses, salivary glands: diseases, semeiology
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Summary:1  Department of Medicine, Veterans Affairs Medical Center, Long Beach 90822; University of California, Irvine 92717; and 2  Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90033 We studied the within-night variability of the maximum esophageal pressure deflection before apnea termination (DP max ) in nine patients with severe obstructive sleep apnea as an index of the arousal threshold and the mean electroencephalogram (EEG) delta power for each 30 s as an index of the timing of sleep cycles. Periodicity in the time variation of delta power and DP max was analyzed by determining their power spectral density and their relationship determined by cross correlation. DP max and delta power varied cyclically and in phase with a major periodicity (major peak in power spectral density) of 117.6 ± 8.8 (SE) min. The correlation between the values of DP max and delta power was significant ( P  
ISSN:8750-7587
1522-1601
DOI:10.1152/jappl.1998.85.4.1434