Chapter 5 - Variations in Consciousness Flashcards
Lobes of the brain involved in conciousness? (2)
Frontal + parietal
monitors brain electrical activity
Electroencephalograph (EEG)
2 Ways brain waves are measured
- amplitude
- Frequency
CPS of Beta waves
13-24
CPS of Alpha waves
8-12
CPS Theta waves
4-7
CPS Delta waves
<4
Brain waves associated with normal waking thought, alert problem solving. ALSO REMBrain waves associated with
Beta waves
Brain waves associated with deep relaxation / blank mind meditation
Alpha waves
Brain waves associated with light sleep (stage 1-2)
Theta waves
Brain waves associated with deep sleep AKA slow wave sleep
Delta waves (slow wave)
Production of melatonin / physiological pathway of the biological clock
Light levels > retina > suprachiasmatic nucleus of the hypothalamus > pineal gland > secretion of melatonin
How much time do infants spend in REM sleep per night?
%
50%
What percentage of time sleeping is spent in REM for adults?
20%
A difference between a 20 year old and 70 year old sleep structure?
Older will spend more time in stage 2, less time in stage 3 (deep sleep)
consists of the afferent fibres running
through tbe reticular formation that influence
physiological arousal.
ARAS (ascending reticular acticating system)
2 areas in the brain critical to the generation of REM sleep
PONS and adjacent areas in the MIDBRAIN