Revision on UNIT 4- Sac 1 Flashcards
A typical sleep cycle is
nrem 1,2,3,4,3,2, rem
Which Stage has more than 50% delta waves?
NREM S4
If i get hit by a ball but my sense of pain has dulled, which characteristic of ASC have i just experienced?
Perceptual distortion
Describe the freq and amp of Theta waves
medium freq, mixed amp
why is there no dreaming in microsleep?
bc microsleep brainwaves are similar to early stages of NREM sleep
Which brain waves are present in microsleeps
alpha and theta
The survival theory of sleep suggests that animals sleep less if they are ____________
vulnerable to predators
Is quantitative data objective or subjective?
objective
Is qualitative data objective or subjective?
subjective
are EEG EOG and EMG examples of quantitative or qualitative?
Quantitative
Give one benefit of testing sleep in a sleep lab
there are multiple measuring devices in a lab
What is special in brain wave patterns NREM S2?
there are sleep spindles and k-complex waves
What are sleep spindles?
brief bursts of high freq brain waves in NREM S2
what are k-complex
brief bursts of lower freq but higher amp waves
Name the brain waves involved in each stage of sleep
NREM 1,2,3,4
NREM 1
- alpha and theta
NREM 2
- mainly theta
- sleep spindles+ kcomplex
NREM 3
- theta and delta
NREM 4
- mainly delta
Which stages are involved in ‘Slow wave sleep’
NREM 3+4
What are the three things a hypothesis must include
- pop
- iv/dv
- directrion
In REM sleep, is body muscle movement high or low?
low
Compare muscle movement in REM and NREM sleep
there is an increase in body muscle movement in NREM sleep compared to a decrease in REM sleep
Define controlled processq
an action that requires high mental effort/foccused attention/ concious awareness
What phsiological things happen during REM? (2)
Faster pulse and breathing
What do stimulants and depressants to do brainwaves
stimulants increase beta
depressants increase alpha
What does ‘saw tooth waves’ refer to
REM sleep
give a limitation each for the Restorative theory and Evolutionary Theory
restorative
- we don’t sleep for much longer after unusual physical activity
evolutionary
- animals are still vulnerable to predators when asleep
Give an example of a Circadian rhthm and Ultradian rhytm
Circadian: sleep wake cycle
Ultradian: REM/NREM cycle
What stage of sleep is a sleep walker in?
S3 or 4 NREM
how many hours of sleep do infants get
16 hours
the evolutionary theory suggests that…
animals with many predators who cannot hid safely sleep less because they need to stay alert
define partial sleep deprivation
inadequate amount of sleep either in terms of quantity or quality in a 24-hour period.
define complete sleep deprivation
no sleep for an entire 24 hours or more for either one night or several nights in a row.
