sleep

Question 1

biological rhythm

Answer 1

any periodic, regular fluctuation in a biological organism

Question 2

circadian rhythm

Answer 2

a biological cycle, such as sleeping and waking, that occurs approximately every 24 hours

Question 3

Suprachiasmatic nuclei (SCN)

Answer 3

synchronizes circadian rhythm with our brain and environmental cues

Question 4

sleep stage 1

Answer 4

eyes move less, breathing slows, muscles relax

Question 5

sleep stage 2

Answer 5

eye movements stop, sleep spindles are present on EEG

Question 6

sleep stages 3 & 4

Answer 6

deepest stages of sleep. very slow brain waves with peaks. walking/talking in sleep occurs during this time

Question 7

REM sleep

Answer 7

begin to cycle backwards, but instead of returning to stage 1 you enter a new cycle. internally active, externally immobile

Question 8

REM Cycle

Answer 8

rapid eye movements associated with dreaming. takes 90 mins to complete one cycle

Question 9

NREM

Answer 9

stages of sleep that are not accompanied by REM sleep

Question 10

restoration theory

Answer 10

sleep recharges the battery which enables us to recover from the days physical, cognitive, and emotional demands

Question 11

circadian theory

Answer 11

sleep is a neural mechanism so that animals can conserve energy and minimize our exposure to predators

Question 12

consolidation theory

Answer 12

process of converting short term memory to long term memory. occurs in hippocampus, highly active in REM sleep

Question 13

neural synthesis theory

Answer 13

explains that sleep functions to allow the synthesis, or merging, of random neural activity

Question 14

3 sources that influence dreams

Answer 14

1. concerns about everyday life
2. external stimuli
3. the people themselves

Question 15

3 evidences we dream

Answer 15

1. all mammals have REM
2. the amount of REM is the greatest early in life
3. rebound effect after deprivation: you will have more REM sleep if you were deprived of sleep the night before

Question 16

Freud’s interpretation of dreaming

Answer 16

all people are unconsciously motivated by our aggressive and sexual urges/drives so we have to put it somewhere else