Neurovascular Coupling and Bilateral Connectivity During NREM and REM Sleep

Overview

Journal Elife

Specialty Biology

Date 2020 Oct 29

PMID 33118932

Citations 51

Authors

Kevin L Turner

Kyle W Gheres

Elizabeth A Proctor

Patrick J Drew

Affiliations

Soon will be listed here.

Abstract

To understand how arousal state impacts cerebral hemodynamics and neurovascular coupling, we monitored neural activity, behavior, and hemodynamic signals in un-anesthetized, head-fixed mice. Mice frequently fell asleep during imaging, and these sleep events were interspersed with periods of wake. During both NREM and REM sleep, mice showed large increases in cerebral blood volume ([HbT]) and arteriole diameter relative to the awake state, two to five times larger than those evoked by sensory stimulation. During NREM, the amplitude of bilateral low-frequency oscillations in [HbT] increased markedly, and coherency between neural activity and hemodynamic signals was higher than the awake resting and REM states. Bilateral correlations in neural activity and [HbT] were highest during NREM, and lowest in the awake state. Hemodynamic signals in the cortex are strongly modulated by arousal state, and changes during sleep are substantially larger than sensory-evoked responses.

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