Biological rhythms RESEARCH

1. Deprived rats of sleep for 4 weeks, lost weight, temp became unstable, thyroid gland failed, immune failure, all died by 4 weeks (13)
5. Jet lag: adjustment is faster for westbound flights than eastbound (5, 2, 2)
6. Circadian rhythms: removed hamsters SCN, their rhythms disappeared. Transplanted SCN tissue restored their rhythms (6)
7. Circadian rhythms: blind from birth, had a circadian rhythm of 24.9 hours despite exogenous zeitgebers like social cues (5, 2, 2)
10. Shift work: philadelphia police dept, 1/2 had sleeping problems, 1/4 had accidents, adjusted the pattern and accidents and sleep problems decreased (8)

2. Reviewed 50 studies of sleep deprivation,very few showed serious effects (5)
3. Circadian rhythms:spent 6 months in a cave, his sleep wake cycle extended to 25 hours (6)
4. Jet lag: 40 flight attendants on a 4 day flight across 10 time zones. Sleepiness, temp, melatonin and cognitive measured. Sleepier, desychronised temp and melatonin, cog decreased. (5, 2, 2)
8. Function of sleep: protection from harm! (6)
9. Sleep walking practical app: killed his 82 year old father, not guilty due to insanity (5, 4)

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