mod 8: sleep and dreams

Question 1

What are some of the rhythms we all share?

Answer 1

annual cycles, 28 day menstrual cycles, 24 hour day cycles, 65-90 minut sleep cycles

Question 2

what is the circadian rhythm?

Answer 2

the bodys biological rhythm which regulates other rhythms, wakefulness, body temp, etc. all on a 24 hour clock

Question 3

define and describe the stages of sleep:

Answer 3

NREM-1: drifting on the edge of consciousness, hallucinations and stuff
NREM-2: sleep spindles occur and minor noises will not disrupt you, starting to sleep
NREM-3: breathing and pulse slow down, slow delta waves pop up, deep sleep
REM: increased eye movement, loss of muscle control, dreaming

Question 4

time spent per stage of sleep:

Answer 4

1: 5-10 minutes
2: 10-25 minutes
3: 20-40 minutes
REM: 10-60 minutes

Question 5

list and define the waves of the brain:

Answer 5

alpha: (a for awake!) slow, relaxed, awake brain waves

delta (d for deep sleep): large, slow waves of sleep

hallucinations: false senses

Question 6

List the functions of sleep

Answer 6

1. protection: served to protect our ancestors from predators (giraffes sleep 2 hours!)
2. Recuperation: restores body tissues in brain, neuron repair, works on brain connections
3. restores memories by repairing, reorganizing, and consolidating
4. Feeds creativity, brain has down time and still thinks to help solve complex problems
5. growth process: pituitary gland growth hormone active in sleep

Question 7

true/false: larger animals cannot afford to sleep as long

Answer 7

true, as they are at greater threat of being found and preyed upon

Question 8

which function of sleep is the only scientifically provable one? what part of the brain does it?

Answer 8

growth process, growth hormone released by pituitary gland

Question 9

effects of sleep loss

Answer 9

fatigue, lowered concentration, depressed immune system, more vulnerability to accidents

Question 10

what is insomnia? what should you NOT do to fix it?

Answer 10

chronic issues falling or staying asleep, do not take quick pills/alcohol, just aggravates and can reduce sleep

Question 11

define narcolepsy

Answer 11

uncontrollable fits of passing out into sleep (usually lasts less than 5 mins)

1/2000 americans suffer from it

Question 12

sleep apnea

Answer 12

altered/impacted breathing patterns during sleep, momentary reawakening, deprives slow wave sleep (1/20 americans)

Question 13

define night terrors

Answer 13

withing first 2/3 hours of sleep, usually during rem, person appears terrified and screams but doesnt rmr

Question 14

freuds contribution

Answer 14

we dream bcz wish fulfillment/discharge of otherwise unacceptable fulfillment

Question 15

what proportion of dreams rmr’ed are negative?

Answer 15

8/10

Question 16

what are rem dreams?

Answer 16

hallucinations

Question 17

what are some proposed reasons that we dream?

Answer 17

1. freud/wish fulfillment
2. information processing (helps sift and sort out days learning/experience)
3. physiological function, periodic brain stimulation to preserve pathways
4. neural activation: making sense of random static activity/stimuli
5. cognitive maturation/development and turning experience from slideshows to stories

Question 18

what is REM rebound?

Answer 18

REM sleep increases following REM deprivation

Question 19

Define activation-synthesis theory

Answer 19

neural activity in sleep is random, dreams are the brains way of making sense of it alll (but dreams mean nothing)

Question 20

true/false: the limbic system is active during sleep

Answer 20

true