Slow spontaneous hemodynamic oscillations during sleep measured with near-infrared spectroscopy

Jaakko Virtanen; Tiina Näsi; Tommi Noponen; Jussi Toppila; Tapani Salmi; Risto J. Ilmoniemi

doi:10.1117/12.889480

9 June 2011 Slow spontaneous hemodynamic oscillations during sleep measured with near-infrared spectroscopy

Jaakko Virtanen, Tiina Näsi, Tommi Noponen, Jussi Toppila, Tapani Salmi, Risto J. Ilmoniemi

Proceedings Volume 8088, Diffuse Optical Imaging III; 808806 (2011) https://doi.org/10.1117/12.889480
Event: European Conferences on Biomedical Optics, 2011, Munich, Germany

Abstract

Spontaneous cerebral hemodynamic oscillations below 100 mHz reflect the level of cerebral activity, modulate hemodynamic responses to tasks and stimuli, and may aid in detecting various pathologies of the brain. Near-infrared spectroscopy (NIRS) is ideally suited for both measuring spontaneous hemodynamic oscillations and monitoring sleep, but little research has been performed to combine these two applications. We analyzed 30 all-night NIRS-electroencephalography (EEG) sleep recordings to investigate spontaneous hemodynamic activity relative to sleep stages determined by polysomnography. Signal power of hemodynamic oscillations in the low-frequency (LF, 40-150 mHz) and very-low-frequency (VLF, 3-40 mHz) bands decreased in slow-wave sleep (SWS) compared to light sleep (LS) and rapid-eye-movement (REM) sleep. No statistically significant (p < 0.05) differences in oscillation power between LS and REM were observed. However, the period of VLF oscillations around 8 mHz increased in REM sleep in line with earlier studies with other modalities. These results increase our knowledge of the physiology of sleep, complement EEG data, and demonstrate the applicability of NIRS to studying spontaneous hemodynamic fluctuations during sleep.

Citation Download Citation

Jaakko Virtanen, Tiina Näsi, Tommi Noponen, Jussi Toppila, Tapani Salmi, and Risto J. Ilmoniemi "Slow spontaneous hemodynamic oscillations during sleep measured with near-infrared spectroscopy", Proc. SPIE 8088, Diffuse Optical Imaging III, 808806 (9 June 2011); https://doi.org/10.1117/12.889480

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