Lesson 4 Sleep Deprivation

Total Deprivation Partial Deprivation

Sleep Deprivation:

No sleep 24 hoursSome sleep in 24 hours

Lack of sleep

Psychological Effects

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

Effects of the loss of REM and NREM sleep

HOT TOPICREM 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

If I stay out partying all night Friday night, will sleeping in the

next day make it all better?

Sleep recovery patterns

Generally an extended good nights sleep is enough to recover from sleep deprivation

Sleep DEBT

REM Rebound

MicrosleepsLike 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

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 minThe 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)