Psychology AQA; Biological Ryhtms, Sleep Deprivation Powerpoint

Powerpoint describing sleep deprivation and the studys relating to it. I used this as a class presentation (hence the any questions at the end ^^) and it's aim was to introduce it to the class. So if it's not very detailed i'm very sorry but my class seemed to like and found it very informative.

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  • Created by: ryan
  • Created on: 26-09-12 13:22

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Slide 1

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Sleep Deprivation.
By Ryan Barker…read more

Slide 2

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Definition of Sleep Deprivation?
· Definition:
"A lack of restorative sleep over a cumulative
period so as to cause physical or psychiatric
symptoms and affect routine performances of
tasks."…read more

Slide 3

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So what are the consequences of sleep
There are two types of sleep deprivation:
Long Term or total sleep deprivation (sleep
deprivation over months or even years e.g.
Short Term or Partial sleep deprivation (days or
around a week e.g.
adjusting to a new night shift)
These effect the body in almost completely
different ways:…read more

Slide 4

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The Long term effects of sleep
· Sleep helps regulate blood sugar levels in the body; so if you don't
get enough sleep, Type 2 diabetes is a real possibility.
· Lack of sleep will disrupt hormones used to control hunger (ghrelin
and leptin)... this will cause you to eat more then you require and
weight gain is a possibility.
· There are suggested fatal consequences of sleep deprivation as
A study done on rats by Rechtschaffen et al. (1983) had rats kept
awake for 33days. These rats eventually died.
Even though the experiment was on rats and not people it shows the potential harmful
consequences of the lack of sleep
Rats are completely different to humans therefore low ecological validity.
Scientists have suggested it was stress that killed the rats and not the lack of sleep.
Rotenberg (2005) did the experiment with pigeons; they suffered no ill side effects.
Randy Gardner a 17 year old boy stayed awake for 260 hours and had no ill side effects.…read more

Slide 5

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The Short Term Effects of Sleep
· For Charity, American DJ Peter Tripp stayed awake for 201
hours. During this time He became abusive and began to
hallucinate (also became very paranoid). His body
temperature and brain wave activity declined the more time
he was awake. In the end Tripp recovered (biologically) after a
24hour sleep.
· Peter Tripp was a single case study; just like Freud's work, it's
very hard to apply to the entire population (low ecological
· The experiment allows us to see to see certain changes in
human body functions as the deprivation of sleep increased.
· Randy Gardner a 17 year old boy stayed awake for 260 hours
and had no ill side effects.
· Tripp seemed different after the experiment that caused him
and his wife to have a divorce; questioning if he fully
recovered mentally.…read more

Slide 6

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Any other information: Microsleep,
Hai Ngoc, REM Rebound.
· When a person is awake for more then 72hours they
experience the same brain signals as people who are
asleep. Williams et al (1959) said they could receive
the same benefit as people who are asleep while
seeming to be awake.
· Hai Ngoc is a Vietnamese man who from 1973 has
apparently has stopped sleeping altogether.
· Rem rebound is where the body doesn't get enough
sleep in the night and REM sleep is interrupted. The
body tries to make up for the lost REM sleep time and
goes into REM sleep more quickly. Empson said it was
up to 50% quicker.…read more

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