Flashcards in Module 5.1 - Sleep Deck (76)
a persons subjective awareness, including thoughts, perceptions, experiences of the world and self-awareness
moment to moment experiences
can we experience altered states of consciousness?
true or false: mental activity only occurs when we are conscious
FALSE: mental activity can occur even when we are not conscious
patterns of behaviour - ranging from hormones to over actions - that cycle within days, weeks, months or years
what are biological rhythms often adapted to?
cycles in an organisms environment
what are the 3 types of biological rhythms?
1) Infradian rhythm
2) Ultradian rhythm
3) Circadian rhythms
any rhythm that occurs over a period of time longer than a day
circannual rhythm means what?
literally means "a yearly cycle"
what is an example of the infradian rhythm?
any rhythm that occurs more frequently than once a day
what is an example of the ultradian rhythm?
heart rate, urination and some hormonal activity occurs in 90-120 minute cycles
internally driven daily cycles of approx 24 hours affecting the physiological and behavioural processes
what is an example of the circadian rhythms?
sleep-wake cycle and fluctuations in hunger
suprachiasmatic Nucleus (SCN)
a part of the hypothalamus that receives input from the retina about light levels
what gland does the Suprachiasmatic Nucleus (SCN) communicate with?
what hormone does the pineal gland release?
a sleep related hormone whose levels peak at night time and are reduced during wakefulness
where does information about melatonin go?
when biological rhythms become synchronized to external cues such as light, temperature or even a clock
biological rhythms that are generated by our body independent of external cues such as light
what does your degree of alertness depend on?
where you are in your circadian rhythm
as people age they tend to require less sleep, particularly from the stage known as _________.
what are the 2 ways of measuring sleep?
polysomnography and electroencephalography (EEG)
a set of objective measurements used to examine physiological variables during sleep
what can polysomnography include?
heart rate, eye movements, respiration rate, muscle contractions and brain activity
a device that measures brain waves using sensors attached to the scalp. these waveforms are described by their frequency and amplitude
how do the stages of sleep in humans work?
humans move from stage 1 through stage 4 and then cycle back to stage 1
a stage of sleep characterized by quickening brain waves inhibited body movement and rapid eye movements (REM)