Ch. 7 Importance of sleep Flashcards Preview

Psychology year 12 > Ch. 7 Importance of sleep > Flashcards

Flashcards in Ch. 7 Importance of sleep Deck (13):
1

Sleep

An altered state of consciousness that features the suspension of awareness of the external environment

2

REM sleep

A type of sleep characterised by brainwaves with high frequency and low amplitude. The muscles are in a state of paralysis and dreams may be experienced

3

NREM sleep

A type of sleep where the sleeper falls into a deeper sleep as the stages progress. Characterised by relaxation of the muscles and a slowing down of physiological functions

4

Hypnogogic state

A state when a person is drifting from wakefulness to sleep

5

Hypnic jerk

A reflex muscle contraction that occurs during stage 1 NREM sleep as the body is relaxing

6

Dreams

A series of images, thoughts and emotions that passes through the mind during sleep

7

Paradoxical sleep

Occurs during REM sleep where physiologically a lack of muscle tone is experienced and the body is still and relaxed but the brain is active and alert

8

Biological rhythms

The cyclical natural rhythms our body follows to perform a variety of functions

9

Circadian rhythms

Regular automatic physiological changes that occur during a 24 hour cycle to regulate bodily processes

10

Ultradian rhythm

A biological rhythm that follows a cycle of less than 24 hours such as eye blinks, heartbeats and sleep patterns

11

Melatonin

A hormone secreted by the pineal gland that causes drowsiness and helps regulate the sleep - wake cycle

12

Restoration theory

A theory that states that sleep is vital for replenishing the mind and body to keep them functioning at optimal levels

13

Evolutionary theory

A theory that suggests that we have periods of sleep when we do not need to engage in activities important to our survival