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27 Cards in this Set
- Front
- Back
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Circadian rhythm
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a biological cyclical occurrence that operates once a day, e.g. the sleep wake cycle
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Ultradian rhythm
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a biological occurrence that operates more than once a day, e.g the sleep cycle
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Brainwaves
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the lines or patterns n a graph that are produced when electrical activity of the brain is detected and recorded
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Frequency
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the number of brain waves that occur per second (the speed)
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Amplitude
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the intensity or strength of brainwaves as measured by the height of a brainwave from peak to trough
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Beta waves
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brainwaves produced when awake and alert, and during REM sleep
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Alpha waves
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brainwaves associated with a very relaxed but wakeful state, such as meditation
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Theta waves
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brainwaves that are produced when falling asleep, associated with light sleep
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Delta waves
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brainwaves associated with deep sleep, also referred to as "slow-wave sleep"
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NREM sleep
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consists of four stages of sleep characterised by little to no eye movements, decreased heart rate, blood pressure and metabolic rate, and relaxation of the body's muscles where movement is possible
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Hypnic jerk
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sudden leg movement or spam in the body that may occur as a person drifts off to sleep
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Sleep spindle
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signifies the true onset of sleep and is characterised by a short burst of high frequency brain waves that last approximately a second
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K-complex
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a brain wave pattern that occurs in response to stimuli in the environment or muscle tension in the body, charectersed by a single low burst of frequency and high amplitude brainwave activity in stage 2 sleep
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Slow-wave sleep
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refers to stages 3 and 4 sleep which is the deepest stage of sleep characterised by slow and low frequency waves of high amplitude
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REM sleep
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a fifth stage of sleep charcaterised by quick, jerking eye movements, increased heart rate, blood pressure, and metabolic rate, and a complete paralysis of the muscles in the body REM sleep is also called 'paradoxical sleep
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Sleep deprivation
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not getting adequate sleep
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Electroencephalograph (EEG)
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a device that detects, records and amplifies the electrical activity of neurons in the brain
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Electrooculograph (EOG)
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a device that detects, records and amplifies the electrical activity of the muscle responsible for controlling eye movements
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Galvanic skin response (GSR)
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a device that records the electrical conductivity of the skin, or the ability of the skin to pass an electrical current. Increased perspiration leads to a high GSR reading
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Sleep laboratory
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a room in a hospital where sleeping studies take place. The room is set up like a bedroom with devices to measure a range of physiological changes that occur during sleep
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Polysomnogram
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a sleep study consisting of many measures to assess the functions of the body an brain during sleep
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Sleep diary
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A detailed account of sleep and wake habits that is usually completed 1 to 2 weeks prior to undergoing a sleep study
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Partial sleep deprivation
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Sleeping for some of the night but not getting enough sleep required
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Total sleep deprivation
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Not sleeping at all
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Selective sleep deprivation
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Not getting enough of a particular type of sleep such as REM sleep or slow-wave sleep
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REM rebound
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The tendency of a sleeper to spend extra time in REM sleep to make it up for previously lost REM sleep
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Delayed onset of sleep
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The time a person falls asleep is later than expected or later than their usual routine
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