12 Sleep

Question 1

Three measurements of sleep

Answer 1

Electro-encephalogram (head)
Electro-oculogram (eye)
Electro-myogram (neck)

Question 2

Describe pre sleep alpha waves

Answer 2

Bursts of 8-12Hz activity in low amplitude/ high frequency

Question 3

Describe the four stages of sleep alpha waves

Answer 3

Progressive increase in amplitude and decrease in frequency across the 4 stages

Question 4

Sleep spindle

Answer 4

1-2secs burst of 12-14Hz waves

Question 5

K complex

Answer 5

Single large upward then downwards deflection

Question 6

How long does each sleep cycle last?

Answer 6

90mins

Question 7

Initial stage 1 EEG

Answer 7

The first time we experience stage 1 sleep in a night

Question 8

Emergent stage 1 EEG

Answer 8

Any subsequent times we experience stage 1 sleep that night

Question 9

When do we experience REM and lack of core muscle tone

Answer 9

During stage 1

Question 10

Recuperation theory

Answer 10

Being awake disrupts homeostasis, sleeping restores this stage

Question 11

Evolutionary theory

Answer 11

Sleep evolved in humans to prevent accidents and predation at night

Question 12

What is the text of exercise on sleep?

Answer 12

Little to no effect

Question 13

How does sleep deprivation influence us

Answer 13

It influences mood, physiological function, molecular function and executive functions

Question 14

What happens when REM sleep is prevented

Answer 14

The body wants it more, causes a transient rebound

Question 15

What regions of the brain are involved in sleep?

Answer 15

Hypothalamus and reticular system

Question 16

Narcolepsy

Answer 16

A disease causing frequent sudden sleep for short periods

Question 17

REM sleep without core muscle atonia

Answer 17

Dreaming but our muscles still react causing sleepwalking and other movements in sleep