Comparison of Cortical Autonomic Network-Linked Sympathetic Excitation by Mueller Maneuvers and Breath-Holds in Subjects With and Without Obstructive Sleep Apnea
| Autor: | Hisayoshi Murai, Keri S. Taylor, Nobuhiko Haruki, Daniel A. Keir, Derek S. Kimmerly, Philip J. Millar, John S. Floras |
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| Rok vydání: | 2021 |
| Předmět: |
Müller's maneuver
medicine.medical_specialty sympathetic nerve activity Central sleep apnea Physiology medicine.medical_treatment Efferent nerve breath hold Physiology (medical) Internal medicine Heart rate medicine QP1-981 Original Research business.industry functional magnetic resonance imaging (fMRI) Apnea Sleep apnea sleep apnea medicine.disease respiratory tract diseases Obstructive sleep apnea Mueller maneuver Apnea–hypopnea index Cardiology medicine.symptom business |
| Zdroj: | Frontiers in Physiology Frontiers in Physiology, Vol 12 (2021) |
| ISSN: | 1664-042X |
| Popis: | In healthy young volunteers, acquisition of blood oxygen level-dependent (BOLD) magnetic resonance (MR) and muscle sympathetic nerve (MSNA) signals during simulation of obstructive or central sleep apnea identified cortical cardiovascular autonomic regions in which the BOLD signal changed synchronously with acute noradrenergic excitation. In the present work, we tested the hypothesis that such Mueller maneuvers (MM) and breath-holds (BH) would elicit greater concomitant changes in mean efferent nerve firing and BOLD signal intensity in patients with moderate to severe obstructive sleep apnea (OSA) relative to age- and sex-matched individuals with no or only mild OSA (Apnea Hypopnea Index, AHI, ∗-weighted echo planar functional MR imaging. MSNA at rest was greater in those with OSA (65 ± 19 vs. 48 ± 17 bursts per 100 heart beats; p < 0.01). MM and BH elicited similar heart rate, blood pressure, and MSNA responses in the two cohorts; group mean BOLD data were concordant, detecting no between-group differences in cortical autonomic region signal activities. The present findings do not support the concept that recurring episodes of cyclical apnea during sleep alter cortical or peripheral neural responsiveness to their simulation during wakefulness by volitional Mueller maneuvers or breath-holds. |
| Databáze: | OpenAIRE |
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