Sleep is a very widespread, almost ubiquitous phenomenon. Mammals, birds, most reptiles, amphibians, and fishes sleep. Sleep has different characteristics throughout the animal kingdom [1, 2], but common ground can be found in the near-total inactivity, the decreased capacity to react to environmental stimuli, and the cyclic quality of sleep. Even insects and molluscs display prolonged sleep-like periods of inactivity. © 2010 Springer-Verlag Milan.
CITATION STYLE
Bocconi, L., Boschetto, C., Ceriano, F., Kustermann, A., & Zoppini, C. (2010). Rest-activity cycles, clusters and the ontogeny of sleep. In Development of Normal Fetal Movements: The First 25 Weeks of Gestation (pp. 87–95). Springer Milan. https://doi.org/10.1007/978-88-470-1402-2_9
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