2. Lesson 5: Characteristics & Patterns of Sleep
EXAM QUESTION:
Name and describe the unique brain wave
features that are characteristic of stage 2 sleep.
(2 marks)
Monday, 23 January 2012
3. Model Response:
The unique brain wave features that are characteristic of stage 2
sleep are:
• sleep spindles – brief bursts of higher frequency brain waves
• K complexes – single sharp bursts (rise then fall) in amplitude
(and lower frequency).
Theta waves are not ‘unique brain wave features’ characteristic of
stage 2 sleep as they also occur in stage 1 and dominate in stage 3.
Monday, 23 January 2012
4. Sleep Deprivation Lesson 6 Outcomes
*Explain the effects of partial and total loss of sleep
*Understand the importance of REM and NREM sleep
*Describe the patterns of sleep recovery
Monday, 23 January 2012
6. Sleep Deprivation:
Lack of sleep
Total Deprivation Partial Deprivation
Some sleep in 24 hours
No sleep 24 hours
Monday, 23 January 2012
7. Effects of sleep deprivation
Total Deprivation Partial Deprivation
- Sustained attention - Psychological (cognitive, affective,
impaired and behavioural)
- Periods of microsleep - Physiological effects (excluding heart
- Hat phenonmenon rate, respiration, blood pressure and
- Irritability body temperature
- Confusion - Chronic sleep deprivation can lead to
- Delusions / Hallucinations cardiovascular disease, mood disorders
- Sleep Deprivation Psychosis and immune deficiencies
Monday, 23 January 2012
8. Effects of the loss of REM and NREM sleep
Some say:
O T TO PIC
H REM deprivation - memory and learning problems
and mood disturbances
NREM deprivation - disturbances in growth and
restoration of the body’s resources
BUT NOT ALL FINDINGS SUPPORT THIS
Monday, 23 January 2012
9. If I stay out partying all night
Friday night, will sleeping in the
next day make it all better?
Monday, 23 January 2012
10. Sleep recovery patterns
Generally an extended good nights sleep is enough
to recover from sleep deprivation
REM Rebound
HUGE extension on time
spent in REM sleep
Sleep DEBT
Microsleeps
Like any debt, Brief involuntary period of sleep during
accumulates. Can easily be wakeful activity
‘paid off’ with adding a
few hours to your sleep
cycle
Monday, 23 January 2012
