Sleep

Question 1

Awake eyes open

Answer 1

• Active mental concentration

- beta EEG waveform: highest frequency, lowest amplitude

Question 2

Awake, eyes closed

Answer 2

Alpha EEG waveform

Question 3

Non-REM: stages 1-3

Answer 3

1: light sleep; 5%
- theta EEG waveform
2: 45%, deeper sleep, when bruxism(teeth grinding) occurs
- Sleep spindles & K complexes on EEG waveform
3: 25%, deepest, non REM sleep (slow-wave sleep); when sleep walking, night terrors & bedwetting occur
- delta (lowest frequency, highest amplitude) EEG waveform

• “At Night BATS Drink Blood” BATSDB

Question 4

REM sleep

Answer 4

• 25%
• beta EEG waveform (highest frequency, lowest amplitude. Also seen in awake, eyes open)
• loss of motor tone, increased brain O2 use, increased variable pulse & BP, increased ACh
• when dreaming, nightmares, & penile/clitoral tumescence occur
• may serve memory processing function
• depression increased total REM sleep, but decreases REM latency
• extra ocular movements due to activity of PPRF (paramedian pontine reticular formation - aka conjugate gaze center)
• occurs every 90m
• duration increases through the night.