Types of biological rhythms Flashcards
what is a circadian rhythm
A biological rhythm that has a 24 hour cycle
what is an obvious example of a circadian rhythm?
The sleep wake cycle (not to be confused with the sleep cycle)
what is an ultradian rhythm
bio rhythms that occur more than once in a 24 hour period/ each cycle is shorter than 24 hours
give an obvious example of an ultradian rhythm
the sleep cycle (not to be confused with the sleep wake cycle.)
What are infradian rhythms?
bio rhythms that have a longer than 24h cycle.
what is a circannual rhythm
a rhythm that occurs once every year.
what is an obvious example of a circannual rhythm?
SAD seasonal effective disorder
How long does a sleep cycle last before it is repeated?
about 90 minutes
how many times are sleep cycles repeated per night
about 5 times per night
what are the two main phases of sleep?
NREM and REM
NREM is further divided into what phases?
Light (stage 1 and 2). Deep (stage 3 and 4)
