Topic 7 - Sleep and circadain rhythms

Question 1

What are electroencephalograms?

Answer 1

They measure the synchronous, electrical activity from large populations of neurons in the brain.

• Muscle movements with electromyography
• Eye movements with electro-oculography
• Brain activity with electroencephalography

Question 2

why do electroencephalograms have high temporal resolution but low spatial resolution?

Answer 2

have high temporal resolution as it is non-invasive, easy to administer and data is easily gathered.

BUT low spatial resolution as electric fields follow an inverse square law so only cortical activity detectable.

Question 3

What are the 4 main stages of REM sleep?

Answer 3

1. Stage 1 – drowsiness – awakened easily.
2. Stage 2 – light sleep
3. Stage 3 – Deep Sleep
4. VERY DEEP SLEEP
5. Stage 5 – REM SLEEP

Question 4

What is the normal sleeping pattern in humans and how much is REM sleep in young adults?

Answer 4

NORMAL SLEEPING PATTERN (Humans) – REM and non-REM sleep alternate cyclically.

Rem sleep is only 20-25% in young adults.

Question 5

What is the normal sleeping pattern in humans and how much is REM sleep in young adults?

Answer 5

NORMAL SLEEPING PATTERN (Humans) – REM and non-REM sleep alternate cyclically.

Rem sleep is only 20-25% in young adults.