REM and NREM sleep as natural accompaniments of the evolution of warm-bloodedness.

  • J Lee Kavanau
  • Published 2002 in Neuroscience and biobehavioral reviews


Divergence of primitive sleep into REM and NREM states is thought to have occurred in the nocturnal Triassic ancestors of mammals as a natural accompaniment of the evolution of warm-bloodedness. As ambient temperatures during twilight portions of primitive sleep traversed these evolving ancestors' core temperature, mechanisms of thermoregulatory control… (More)


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