Disorders of sleep

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  • Insomnia
    • Criteria for insomnia; sleep onset more than 30 minutes, time in bed spent sleeping is less than 85%, increase in night time awakenings  may be short term, chronic or transient
    • Chronotype: your circadian rhythm is genetic, larks circadian rhythm about 2 hours ahead, fighting these inbuilt mechanisms is likely to result in sleep disturbances, nature rather than nurture, reductionist view
    • Diathesis: genetic predisposition, chronotype effecting sleep area of brain
    • Stress: anxiety, arousal, poor sleep hygiene


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