BMB_3_1_11 - Rhythms of the Brain Chapter 7 Types of...

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Rhythms of the Brain Chapter 7
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Types of Rhythms Circadian – fluctuate daily Sleep-wake, temperature, hormones, urine production, gastrointestinal activity Cognitive and motor performance levels Infradian – less than once a day Hibernation, Migration, Ovulation Ultradian – more than once a day Sleep cycles (REM and other sleep stages) Alertness and cognitive performance (90 min)
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Rhythms Biological beings have naturally occurring biological cycles largely independent of the outside world. Endogeneous cycles may have evolutionary value anticipation of upcoming conditions Migration Storage Mating
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All rhythms typically stay in synchrony suggesting a “master biological clock” exists. Our free running rhythms are often greater than 24 hrs. (24.25- 24.75 hrs). Why don’t we (and other animals) get “off-pace” with the 24 hours daily cycle? Cues (aka: Zeitgebers): reset the master clock.
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This note was uploaded on 06/28/2011 for the course PSYCHOLOGY 253 taught by Professor Knight during the Spring '11 term at University of Alabama at Birmingham.

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BMB_3_1_11 - Rhythms of the Brain Chapter 7 Types of...

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