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What is sleep deprivation?
Not getting the amount of sleep required or are deprived of one particular stage of sleep
Define the two types of sleep deprivation
- Partial sleep deprivation: Not getting sa much sleep as you need in a 24 hour period
- Total sleep deprivation: not sleeping at all in 24 hour period
What are factors that affect how sleep is required?
Age, lifestyle and genetics
What are some psychological effects due to sleep deprivation?
- Cognitive Difficulties
- eg. paying attention,
- Lack of concentration
- Processing information
- Thing and reasoning
- Poor decision making
- Memory problems
- Impaired Creativity
- Distorted perceptions
What are the affective disturbances due to sleep deprivation
- Mood disturbances eg. High emotionality, confusion and irritability, feelings of sadness
- Previously enjoyed activities seem boring
- Lack of motivation
- Feelings of fatigue
What are some behavioural difficulties due to sleep deprivation?
- Slowed performance
- Clumsiness, injuries
- Risk taking behaviour
- Problems performing simple monotonous tasks and that require sustained attention or concentration
List some physiological effects from sleep deprivation
- Slower physical reflexes
- hand tremors
- droopy eyelids
- difficulty in focusing eyes
- heightened sensitivity to pain
- lower energy levels
What is sleep debt?
The accumulated amount of sleep loss from insufficient sleep.
What is REM rebound?
It has been found that people who are deprived of REM sleep tend to experience a significant rise in time spent in REM sleep
What are microsleeps?
- When an individual involuntarily drifts off and stops concentrating during a wakeful activity for 3-15 seconds.
- Caused by sleep deprivation
What can lack of REM sleep cause?
It may cause learning and memory problems, mood disturbances i.e grumpiness, irritability and sadness. Could also cause less protein synthesis which promotes growth of the nervous system.
WHat can lack of NREM sleep cause?
It may interfere with the body replenishing itself physically and restoring body tissues
Describe the sleep/wake pattern of adolescence
- The pattern changes toward the evening due to the melatonin and cortisol hormones being released up to 2 hours later
- Need for more sleep: 9-10 hours
What are the sleep/wake hormones?
- Melatonin is released at night= induces sleepCortisol released in the day= encourages alertness
What is the "hat phenomenon"?
A feeling of tightening around the hat as though a hat that is too small is being worn
What is sleep psychosis?
When depersonalisation occurs and you lose a sense personal identity and increased difficulty coping with other people and environment.
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