Pages in this set

Page 1

Preview of page 1
BIOLOGICAL RHYTHMS & SLEEP
CIRCADIAN, INFRADIAN, AND ULTRADIAN RHYTHMS, INCLUDING THE ROLE OF
ENDOGENOUS PACEMAKERS AND OF EXOGENOUS ZEITGEBERS IN THE
CONTROL OF CIRCADIAN RHYTHMS

CIRCADIAN RHYTHMS

24 Hour (Daily) cycles i.e. the sleep/ wake cycle, body temperature.
Sleep/ Wake cycle- Average of 7 to 8 hours sleep a day.…

Page 2

Preview of page 2
->Exposure to light as a treatment significantly helped, however it did not work for
summer affected patients.

AO2

Yang & Schank- Chinese women living in university accommodation showed no synchronisation of
menstrual cycles.
Some SAD patients secrete melatonin normally.
Plasma from squirrels injected into a monkey bought on pre-hibernation like…

Page 3

Preview of page 3
Shift Work- Outside of normal bodily hours and the body is not equipped to deal with it so there is
disruption. -> Police had 4 times as many accidents while working nights but this was improved
when shifts were changed.
->Kubo et al- Four times more likely to develop prostate…

Page 4

Preview of page 4
the most difficult stage to be woken from. Paradoxical sleep occurs where the muscles become
paralysed.

LIFESPAN CHANGES

Total sleep time generally decreases as the child matures with the child having 15 hours at birth
and decreasing to around 7 hours in adulthood.
REM sleep also decreases during ageing. A…

Page 5

Preview of page 5
IDASà Nature/ Nurture, Limited, Reductionist, Determinism, Cultural Bias

RESTORATION EXPLANATION

Growth and Repair Hypothesis (Oswald)- REM allows for the restoration of the nervous system
and NREM, especially SWS encourages repair by releasing growth hormone.
->Horne- Repair generally happens during REM and SWS sleep but could take place in optional
sleep…

Page 6

Preview of page 6
->37% of sufferers have a relative with the condition. High concordance rate for
MZ twins with insomnia and low rate in DZ twins.
o Personality Influences- Belief that insomniacs share similar personality traits.
->Kales et al- Tend to share how they handle stress and conflict by internalisation.
Harm avoidance is…

Comments

No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all resources »