A Phylogenetic Analysis of Sleep Architecture in Mammals: The Integration of Anatomy, Physiology, and Ecology

  title={A Phylogenetic Analysis of Sleep Architecture in Mammals: The Integration of Anatomy, Physiology, and Ecology},
  author={John A. Lesku and Timothy C. Roth II and Charles J. Amlaner and Steven L. Lima},
  journal={The American Naturalist},
  pages={441 - 453}
Among mammalian species, the time spent in the two main “architectural” states of sleep—slow‐wave sleep (SWS) and rapid‐eye‐movement (REM) sleep—varies greatly. Previous comparative studies of sleep architecture found that larger mammals, those with bigger brains, and those with higher absolute basal metabolic rates (BMR) tended to engage in less SWS and REM sleep. Species experiencing a greater risk of predation also exhibited less SWS and REM sleep. In all cases, however, these studies lacked… 
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