Ultradian biological Rhythms Flashcards
Give an example of an Ultradian Rhythm
Sleep: consisting of different stages we pass through more than one cycle per night
Sleep is an altered state of consciousness which is broken into five stages of…?
NREM (non-rapid eye movement)
REM ( rapid eye movement)
The sleep cycle usually repeats itself about…?
5 times during the night
What happens once NREM stages have been reached?
The cycle goes into reverse through to REM sleep
How long does one cycle last?
Approximately 90 mins.
When is NREM sleep and how many stages is it?
When we first fall asleep
stages through 1-4
What waves are displayed on the EEG in stage 1?
Theta
What waves are shown after 15ish minutes in Stage 2
Slower delta waves indicating stage 3, followed by four
What are stages 3 and 4 also known as?
Slow wave sleep, similar characteristics
What are at their lowest points in stage 4?
Blood pressure and heart rate that have been gradually slowing
What is most likely to occur in this stage because movement is still possible?
Sleepwalking
After the reversal of stages about 75 mins into sleep we enter the…?
REM stage of sleep
EEG activities change to similar when awake, what are these waves called?
Fast Alpha Waves
We become paraylsed because?
voluntary muscle activity is suppressed
What fluctuates and what twitches?
Heart rate, blood pressure and respiration.
Muscles
