1.5 Consciousness Flashcards
intentionality
the quality of being directed towards an object
unity
resistance to divison
- the ability to integrate info from all the senses into one coherent whole
- ex movie theater
selectivity
the capacity to include some objects, but not others
- cocktail party phenomenon
dichotic listening
a task in which people wearing headphones hear different messages presented to each ear
- consciousness filters out some info
transience
the tendency to change
- the mind wanders from one thing to the next
is sleep ever on or off?
no. sleep is characterized by levels of deeper and lighter periods of sleep
- each level has a characteristic pattern of brain activity as measured by an EEG
high frequency (beta waves) during…
alertness
lower-frequency (alpha waves) during…
relaxation
stage 1 sleep
theta waves
stage 2 sleep
theta waves are interrupted by sleep spindles and k-complexes
stage 3 and stage 4 sleep
delta waves (deepest sleep stage)
REM sleep (what kind of waves and what is it?)
high frequency saw-tooth waves (similar to beta waves, which are present during wakeful times)
- REM = Rapid Eye Movement
- high level of brain activity
during REM sleep:
- pulse quickens
- blood pressure rises
- dreams
- telltale signs of sexual arousal
muscle movements indicate that the sleep is very still
amount of sleep required for newborns, 6 year olds, adults?
newborn: more than 16 hrs of sleep per day / sleep 6 or 8 times in 24 hrs
6 year old: 11 or 12 hrs
adult: 7 hours
sleep to wake ratio in our lifetime in hours
1 sleep: 2 awake
what happened when the rats were sleep deprived
-trouble controlling body temperature
- lost weight
- ate more than normal
- their bodily systems break down and they die after about 21 days
how are sleep and memory connected?
memory deteriorates unless sleep occurs to help keep them in place
specific effects of REM deprivation
- memory loss
- excessive aggression
- REM rebound (rem sleep deprivation causes a rebound of more REM sleep the next night)
insomnia
- difficulty falling asleep or staying asleep
- most common sleep disorder
- 6% meet criteria for diagnoses and 30-48% report symptoms
types of insomnia
- self-induced: due to lifestyle choices
- secondary: due to another medical condition
- primary: no obvious causing factors
- each type can be exacerbated by worrying about insomnia
sleep apnea
- a disorder in which the person stops breathing for brief periods while asleep most likely due to obstructions (snoring)
- occurs most often in middle-aged, overweight men