Comparative Perspectives that Challenge Brain Warming as the Primary Function of REM Sleep

iScience

Baptiste Barrillot¹  Gianina Ungurean²  Paul-Antoine Libourel²  Niels C. Rattenborg³  Dolores Martinez-Gonzalez³ 

[1] CRNL, SLEEP Team, UMR 5292 CNRS/U1028 INSERM, Université Claude Bernard Lyon 1, Lyon, 69675 Bron, France;Avian Sleep Group, Max Planck Institute for Ornithology, 82319 Seewiesen, Germany;CRNL, SLEEP Team, UMR 5292 CNRS/U1028 INSERM, Université Claude Bernard Lyon 1, Lyon, 69675 Bron, France;

关键词: Neuroscience;    Behavioral Neuroscience;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Rapid eye movement (REM) sleep is a paradoxical state of wake-like brain activity occurring after non-REM (NREM) sleep in mammals and birds. In mammals, brain cooling during NREM sleep is followed by warming during REM sleep, potentially preparing the brain to perform adaptively upon awakening. If brain warming is the primary function of REM sleep, then it should occur in other animals with similar states. We measured cortical temperature in pigeons and bearded dragons, lizards that exhibit NREM-like sleep and REM-like sleep with brain activity resembling wakefulness. In pigeons, cortical temperature decreased during NREM sleep and increased during REM sleep. However, brain temperature did not increase when dragons switched from NREM-like to REM-like sleep. Our findings indicate that brain warming is not a universal outcome of sleep states characterized by wake-like activity, challenging the hypothesis that their primary function is to warm the brain in preparation for wakefulness.

【 授权许可】

Unknown