Sleep deprivation

1. Lesson 4 Sleep Deprivation

2. Total Deprivation Partial Deprivation
Sleep Deprivation:
No sleep 24 hours
Some sleep in 24 hours
Lack of sleep

3. Psychological Effects

5. Effects of sleep deprivation
Total Deprivation Partial Deprivation
- Sustained attention
impaired
- Periods of microsleep
- Hat phenonmenon
- Irritability
- Confusion
- Delusions / Hallucinations
- Sleep Deprivation Psychosis
- Psychological (cognitive, affective,
and behavioural)
- Physiological effects (excluding heart
rate, respiration, blood pressure and
body temperature
- Chronic sleep deprivation can lead to
cardiovascular disease, mood disorders
and immune deficiencies
Complex cognitive task performance may not be impacted by disrupted
sleep as severely as simple cognitive task performance

6. Effects of the loss of REM and NREM sleep
HOT TOPIC
REM deprivation - memory and learning problems
and mood disturbances
Some say:
NREM deprivation - disturbances in growth and
restoration of the body’s resources
BUT NOT ALL FINDINGS SUPPORT THIS

7. If I stay out partying all night
Friday night, will sleeping in the
next day make it all better?

8. Sleep recovery patterns
Generally an extended good nights sleep is enough to recover from sleep
deprivation
Sleep DEBT
REM Rebound
Microsleeps
Like any debt,
accumulates. Can easily be
‘paid off’ with adding a
few hours to your sleep
cycle
HUGE extension on time
spent in REM sleep
Brief involuntary period of sleep during
wakeful activity

9. Microsleeps
Are defined as a brief period of drowsiness/sleeping which occur
while a person is awake that last for a few seconds up to 2 min
The person loses awareness of internal state and external
environment (That is why it is a ASC)
EEG shows lower frequency, higher amplitude alpha/theta brain
waves (similar to light sleep)