Swann_9172007 - Jennifer Swann PhD Lehigh university g y...

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Jennifer Swann PhD Lehigh university gy Bios 90/95 Circadian rhythms
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he following have a common The following have a common link in circadian rhythms. • Three mile island, Exon Valdez, hernobyl Chernobyl • Jet lag • Anesthetics
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What is rhythm?
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ircadian rhythms are a subset Circadian rhythms are a subset of biological rhythms ardiac rhythm = 8 seconds Any measurable parameter in a living rganism with a Cardiac rhythm τ 8 seconds organism with a regular interval. • Biological rhythms have periods that nge from 8 range from 8 seconds to several years.
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What is a circadian rhythm? 1. Period of about 24 hours 2. Endogenously generated 3. Entrained by external signals
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Free running rhythms • This figure shows the rhythms of a human ale during exposure male during exposure to external cues (first and last 10 days) and in e absence of cues. the absence of cues. • Note that the rhythms “entrain” to the external ues and persist in the cues and persist in the absence of cues with a period slightly greater an 24 hours than 24 hours.
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This note was uploaded on 03/09/2008 for the course BIOS 95 taught by Professor Varies during the Spring '08 term at Lehigh University .

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Swann_9172007 - Jennifer Swann PhD Lehigh university g y...

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