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Psychology revision Part C ­ Disorders of sleep

Sleep disorders explanations for insomnia
[Defined in terms of the number of hours of sleep a person has because there is large individual's
difference in the amount of sleep which is normal for each person. (e.g. age related differences)
Insomnia may be…

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elements of this would be snoring, sleep walking and teeth grinding. This all increases the likelihood
that someone will experience insomnia.
Personality: Kales et al (1976) suggests that insomnias were more likely to internalise psychological
disturbance rather than acting out problems or being aggressive. Internalisation can lead to higher
levels…

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Narcolepsy: [a disorder where individuals experience sudden and uncontrollable attacks of
sleep at irregular and unexpected times, can last seconds or minutes]
Symptoms: Two main symptoms are feeling sleepy all the time and episodes of cataplexy (loss of
muscular control) during the day. These symptoms are generally aroused by emotional…

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during NREM/SWS and is related to night terrors which are only found in NREM sleep and are also
most common in children.
Real world application: Occasional cases where expert testimony is required in order to be able to
decide whether a person's was actually sleep walking, e.g. cases of murder…

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