Sleep and Arousal Flashcards
1
Q
What is an electroencephalograph?
A
Small voltages recorded from the scalp
2
Q
What does an EEG measure?
A
Average of nerve cells
3
Q
What is EEG used for?
A
Detecting seizure activity or sleep and coma
4
Q
What causes large amplitude waves on EEG?
A
Large groups of neurones firing action potentials in sychronisation
5
Q
Which part of the brain mediates consciousness?
A
Cerebral cortex
6
Q
When is there no activity in EEG?
A
Coma
7
Q
Define sleep
A
Behavioural state in which people are considered unconscious
8
Q
What increases during sleep?
A
Increase growth and rejuvenation of the nervous, skeletal and muscular systems
9
Q
What decreases during normal sleep (SWS)?
A
Heart rate
blood pressure
sympathetic NS activity
10
Q
What is secreted during SWS?
A
Growth hormone
