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Biochemistry, Biophysics, and Structural Biology Commons

Open Access. Powered by Scholars. Published by Universities.®

Animal Sciences

Charles J. Amlaner

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1999

Articles 1 - 3 of 3

Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

Half-Awake To The Risk Of Predation, Niels Rattenborg, Steven Lima, Charles Amlaner Feb 1999

Half-Awake To The Risk Of Predation, Niels Rattenborg, Steven Lima, Charles Amlaner

Charles J. Amlaner

Birds have overcome the problem of sleeping in risky situations by developing the ability to sleep with one eye open and one hemisphere of the brain awake. Such unihemispheric slow-wave sleep is in direct contrast to the typical situation in which sleep and wakefulness are mutually exclusive states of the whole brain. We have found that birds can detect approaching predators during unihemispheric slow-wave sleep, and that they can increase their use of unihemispheric sleep as the risk of predation increases. We believe this is the first evidence for an animal behaviourally controlling sleep and wakefulness simultaneously in different regions ...


Facultative Control Of Avian Unihemispheric Sleep Under The Risk Of Predation, Niels Rattenborg, Steven Lima, Charles Amlaner Dec 1998

Facultative Control Of Avian Unihemispheric Sleep Under The Risk Of Predation, Niels Rattenborg, Steven Lima, Charles Amlaner

Charles J. Amlaner

Birds and aquatic mammals are the only taxonomic groups known to exhibit unihemispheric slow-wave sleep (USWS). In aquatic mammals, USWS permits sleep and breathing to occur concurrently in water. However, the function of avian USWS has been unclear. Our study is based on the premise that avian USWS serves a predator detection function, since the eye contralateral to the awake hemisphere remains open during USWS. If USWS functions as a form of predator detection, then birds should be able to control both the proportion of slow-wave sleep composed of USWS and the orientation of the open eye in response to ...


Sleep, Sleep Disorders, And Biological Rhythms, Charles Amlaner, Robert Greene, Michael Hanson, Greg Greg Nichols, Naomi Rogers, Carol Thibodeau Dec 1998

Sleep, Sleep Disorders, And Biological Rhythms, Charles Amlaner, Robert Greene, Michael Hanson, Greg Greg Nichols, Naomi Rogers, Carol Thibodeau

Charles J. Amlaner

A module to help students to understand the nature and function of sleep and its effects on human health; to experience the process of scientific inquiry; and to recognize the role of science in society and the relationship of basic science and human health.