consciousness

Question 1

how are levels of arousal monitored

Answer 1

electroencephalography

Question 2

EEG rhythms in sleep vs normal waking consciousness

Answer 2

sleep: delta waves slowest (up to 4Hz), theta (4-8 Hz), alpha (8-13 Hz), Beta (13-30 Hz) in normal waking consciousness; alpha is sign of healthy brain activity when eyes closed, and is lost and EEG becomes slower (theta and delta) in brain disorders

Question 3

what are higher frequency neural oscillations (gamma approx 40 Hz) associated with

Answer 3

creation of conscious contents in focus of mind’s eye, via thalamo-cortical feedback loops

Question 4

EEG waves: awake

Answer 4

beta waves (flat)

Question 5

EEG waves: drowsy, relaxed

Answer 5

alpha waves (flat)

Question 6

EEG waves: stage N1 sleep

Answer 6

theta waves

Question 7

EEG waves: stage N2 sleep

Answer 7

sleep spindles

Question 8

EEG waves: stage N3 sleep

Answer 8

delta waves (largest amplitude)

Question 9

EEG waves: REM sleep

Answer 9

fast, random

Question 10

diagram of EEG waves

Answer 10