![]() Polysomnography can detect breathing disorders (such as obstructive sleep apnea), seizure disorders, narcolepsy, periodic limb movement disorder, and unusual movements and behaviors during sleep (parasomnias). A painless clip is attached to a finger or an ear to record oxygen levels in the blood. ![]() Imaging tests commonly used to diagnose nervous system (neurologic) disorders. read more, or ECG), muscle activity ( electromyography Electromyography and Nerve Conduction Studies Diagnostic procedures may be needed to confirm a diagnosis suggested by the medical history and neurologic examination. This record, the electrocardiogram (also known as an ECG). Electrodes are also attached to other areas of the body to record heart rate ( electrocardiography Electrocardiography Electrocardiography (ECG) is a quick, simple, painless procedure in which the heart’s electrical impulses are amplified and recorded. Associated features include the pathological manifestations of rapid-eye-movement (REM) sleep: cataplexy, sleep paralysis, hypnagogic hallucinations, and abnormal sleep-onset REM periods and disturbed nocturnal sleep. The recordings help provide doctors with information about sleep stages. Narcolepsy is a neurological condition with a prevalence of up to 1 per 1,000 that is characterized by irresistible bouts of sleep. ![]() read more, or EEG) as well as eye movements. The Narcolepsy Network adds that cataplexy causes a sudden loss of muscle tone either throughout the body or in certain muscles in response to a strong emotion. Electrodes are pasted to the scalp and face to record the brain's electrical activity ( electroencephalography Electroencephalography Diagnostic procedures may be needed to confirm a diagnosis suggested by the medical history and neurologic examination. Polysomnography is usually done in a sleep laboratory, which may be located in a hospital, clinic, hotel room, or other facility that is equipped with a bed, bathroom, and monitoring equipment. Some people with narcolepsy also have cataplexy episodes of muscle weakness that are triggered by strong emotions such as laughter, surprise, or crying.
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