Also called a sleep study, a test used to diagnose sleep disorders. It records brain waves, the oxygen level in blood, heart rate and breathing, as well as eye and leg movements during the study.
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Electroencephalogram (EEG)
An electrical brain potential recorded by placing electrodes on the scalp
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Electro-oculogram (EOG)
An electrical potential from the eyes, recorded by means of electrodes placed on the skin around them; detects eye movements
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Electromyogram (EMG)
An electrical potential recorded from an electrode placed on or in a muscle
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Electrocardiogram (EKG)
A recording of the electrical activity of the heart
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Hertz
Cycles per second
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Delta waves
Regular, synchronous electrical activity of less than 4 Hz recorded from the brain; occurs during the deepest stages of slow-wave sleep
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Theta waves
EEG activity of 3.5-7.5 Hz that occurs intermittently during early stages of slow-wave sleep and REM sleep
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Alpha waves
Smooth electrical activity of 8-12 Hz recorded from the brain; generally associated with a state of relaxation.
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Beta waves
Irregular electrical activity of 13-30 Hz recorded from the brain; generally associated with a state of arousal
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Sleep spindles
Short bursts of waves of 12-14 Hz that occur between two and five times a minute during stages 1-4 of sleep.
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K complexes
An EEG waveform that occurs during stage 2 of NREM sleep. It is the largest even in healthy human EEG and is more frequent in the first sleep cycles
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REM Sleep (Rapid Eye Movement)
A period of desynchronized EEG activity during sleep, at which time dreaming, rapid eye movements, and muscular paralysis occur
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Paradoxical sleep
Another term of REM sleep
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Sleep deprivation
The condition of not having enough sleep; it can be either chronic or acute. It can cause fatigue, daytime sleepiness, clumsiness, and weight loss or weight gain. It adversely affects the brain and cognitive function
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Contralateral primary somatosensory cortex
Located in the postcentral gyrus and is part of the somatosensory system. Receives all sensory input from the body.
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Memory consolidation
The processes of stabilizing a memory trace after the initial acquisition. It may perhaps be thought of part of the process of encoding or of storage, or it may be considered as a memory process in its own right
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Other cards in this set
Card 2
Front
An electrical brain potential recorded by placing electrodes on the scalp
Back
Electroencephalogram (EEG)
Card 3
Front
An electrical potential from the eyes, recorded by means of electrodes placed on the skin around them; detects eye movements
Back
Card 4
Front
An electrical potential recorded from an electrode placed on or in a muscle
Back
Card 5
Front
A recording of the electrical activity of the heart
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