PSYA3 Sleepwalking

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  • Sleepwalking
    • A01
      • Sleepwalking refers to activities occurring unconsciously when someone is asleep that normally happens when awake.
      • Sleepwalkers are usually unaware of their activities and engage in automatic behaviours, it usually occurs in stage 3 or 4
        • It often occurs during childhood but the cause is unknown.
      • Incomplete arousal
        • A person who is sleepwalking is partily awake in a sense they are taking place in activities a person would do when in a woken state, but they are asleep.
          • They are in a deep sleep which makes it difficult to rouse the sleepwalker.
      • Risk Factors
        • Factors such as sleep deprivation and stress seems likely to increase sleepwalking.
    • A02
      • There is evidence that sleepwalking is inherited. Broughton found that the prevalence of sleepwalking in first degree relatives.
        • Twin studies have also been used, a researcher reported that about 50% concordance rate in MZ twins compared to 10-15% om DZ twins. This shows that there is a tendency for sleepwalking to be inherited through genes.
      • Evidence for sleepwalking may be found from the diathesis model. The model suggest that genes merely provide a vulnerability for sleepwalking, but will only occur in situations of environmental stress.
        • Zarda studied patients who had suspected sleepwalking, and were prevented from falling to sleep. On the first night, patients showed 50% signs of sleepwalking and 90% on the second night.
          • This suggests that sleep deprivation does not lead to sleepwalking in normal people thus, sleep-deprivation was acting as a stressor in people who had a vulnerability for sleepwalking.


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