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The emotional need for the drug to relieve psychological distress
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compulsive pattern of drug use despite negative consequences, with physical and psychological dependency
3
Involves changes in normal body function, user will experience withdrawal from discontinuing use
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sleep phase characterized by darting movements of the eyes under closed eyelids, brain waves appear similar to wakefulness
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transitional phase that occurs between wakefulness and sleep
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the body goes into a state of deep relaxation. Theta waves still dominate the activity of the brain, but they are interrupted by brief bursts of activity known as sleep spindles
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Describes our awareness of internal and external stimuli.
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including sleep apnea, night terrors, restless leg syndrome, and SIDS
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Characterized by high levels of sensory awareness, thought, and behavior
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involves an irresistible urge to fall asleep during waking hours, often triggered by arousal or stress
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often referred to as deep sleep or slow-wave sleep because this stage is characterized by low frequency (less than 3 Hz), high amplitude delta waves
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Includes a variety of negative symptoms experienced when drug use is discontinued. These symptoms usually are opposite of the effects of the drug
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occurs when a person requires more and more drugs to achieve effects previously experienced at lower doses
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which is a lack of muscle tone or muscle weakness, in some cases involves complete paralysis of the voluntary muscles
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difficulty falling/staying asleep for at least 3 days a week for at least a month
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subdivided into three stages distinguished from each other and from wakefulness by characteristic patterns of brain waves, first three stages of sleep
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A state marked by relatively low levels of physical activity and reduced sensory awareness that is distinct from periods of rest that occur during wakefulness ,deprivation results in disruptions in cognition and memory deficits
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