REM Sleep Behavior Disorder Glossary of Terms

The following are health and medical definitions of terms that appear in the REM Sleep Behavior Disorder article.

Acute: Of abrupt onset, in reference to a disease. Acute often also connotes an illness th...

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Antidepressant: Anything, and especially a drug, used to prevent or treat depression.

Antidepressants: Anything, and especially a drug, used to prevent or treat depression.

Apnea: The absence of breathing (respiration).

Atrophy: A wasting away or diminution. Muscle atrophy is a decrease in muscle mass, often ...

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Blood pressure: The blood pressure is the pressure of the blood within the arteries. It is...

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Brain: The portion of the central nervous system that is located within the skull. It func...

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CT scan: Computed tomography scan. Detailed images of internal organs are obtained by this...

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Dementia: Significant loss of intellectual abilities, such as memory capacity, that is sev...

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EEG: Electroencephalogram.

Electrocardiogram: A recording of the electrical activity of the heart. Abbreviated ECG an...

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Electroencephalogram: A technique for studying the electrical currents within the brain. E...

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Electromyogram: A test that records the electrical activity of muscles. Normal muscles pro...

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Heart: The muscle that pumps blood received from veins into arteries throughout the body. ...

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Injure: To harm, hurt, or wound. The word injure may be in physical or emotional sense. Fr...

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Injury: Harm or hurt. To harm, hurt, or wound. The word injure may be in physical or emot...

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Laboratory: A place for doing tests and research procedures, and for preparing chemicals a...

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Limb: An arm or a leg.

MRI: Magnetic resonance imaging.

Multiple system atrophy: See: Shy-Drager syndrome, which is also known as multiple system ...

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Muscle: Muscle is the tissue of the body which primarily functions as a source of power. T...

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Neurological: Having to do with the nerves or the nervous system as, for example, a neurol...

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Neurologist: A physician who specializes in the diagnosis and treatment of disorders of th...

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NREM sleep: NREM (non-rapid eye movement) sleep is dreamless sleep. During NREM, the brai...

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Onset: In medicine, the first appearance of the signs or symptoms of an illness as, for ex...

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Paralysis: Loss of voluntary movement (motor function). Paralysis that affects only one mu...

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Parkinson disease: A slowly progressive neurologic disease characterized by a fixed inexpr...

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Polysomnography: Continuous recording of specific physiologic variables during sleep. Poly...

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Precursor: Forerunner. That which precedes or is derived from an available source.

Prevalence: The proportion of individuals in a population having a disease or characterist...

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Recur: To occur again; to return. For example, a symptom, sign, or disease can recur.

REM sleep: REM sleep is the portion of sleep when there are rapid eye movements (REMs).

Respiratory: Having to do with respiration.

Reuptake: The reabsorption of a secreted substance by the cell that originally produced an...

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Rule out: Term used in medicine, meaning to eliminate or exclude something from considera...

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Scan: As a noun, the data or image obtained from the examination of organs or regions of...

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Serotonin: A neurotransmitter that is involved in the transmission of nerve impulses. Sero...

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Shy-Drager syndrome: A progressive disorder of the central and sympathetic nervous systems...

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Sleep: The body's rest cycle.

Sleep apnea: The temporary stoppage of breathing during sleep, often resulting in daytime ...

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Sleep disorders: Any disorder that affects, disrupts, or involves sleep. The most common...

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Sleep talking: Talking in one's sleep is considered a normal phenomenon that is of no medi...

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Symptom: Any subjective evidence of disease. In contrast, a sign is objective. Blood comin...

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Syndrome: A combination of symptoms and signs that together represent a disease process.

Tremor: An abnormal, repetitive shaking movement of the body. Tremors have many causes and...

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Tricyclic antidepressants: One of a class of medications used to treat depression. The tri...

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Twitching: : Involuntary contractions of groups of muscle fibers. Also known as fasciculat...

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