Ultradian and Infradian Rhythms - BIOPSYCHOLOGY Flashcards
how long is an ultradian rhythm
LESS than one day (u=under a day)
how long is an infradian rhythm
MORE than one day
5 sleep stages
gamma, beta, alpha, theta, delta
what does theta control
light sleep/dreaming/deep mediation
what does delta control
deep sleep/repair (glymphatic cycle)
what idea did Kleitman (1969) develop
the ‘basic rest activity cycle’ (BRAC)
how long is the BRAC
c. 90 mins
when was the glymphatic system first described
2015
what happens within the glymphatic system
cerebrospinal fluid (CSF) helps remove waste products from the brain in a convention process
when does the glymphatic system’s function take place
in pulses throughout the day and night - but is much faster during sleep
what type of rhythm does the glymphatic system have
ultradian (c.90 mins)
what development and treatment can it be used to help understand
Alzeihmer’s
what type of rhythm are the seasonal affective disorders (SADs)
infradian
characteristics of winter SAD
overeating, unexplained weight gain, sleeping more than usual, depression
characteristics of summer SAD
loss of appetite, unexplained weight loss, insomnia, irritability
