Sleep Neurology Glossary

Objective monitoring method using wrist-worn devices to track movement patterns and estimate sleep-wake cycles over exte...

Abnormal presence of alpha frequency waves during NREM sleep, often associated with non-restorative sleep.

Abnormal appearance of alpha waves (8-13 Hz) during non-REM sleep stages, often indicating poor sleep quality or arousal...

Measurement of sleep-disordered breathing severity, calculated as the number of apneas and hypopneas per hour of sleep.

Polysomnographic measure calculating the number of arousals per hour of sleep, indicating sleep fragmentation severity.

The minimum stimulus intensity required to cause awakening or arousal from sleep.

Bilevel positive airway pressure device that provides different pressure levels for inspiration and expiration.

Sudden, temporary loss of muscle tone triggered by strong emotions, typically associated with narcolepsy.

A sleep disorder where breathing stops due to lack of respiratory effort from the central nervous system.

An abnormal breathing pattern characterized by crescendo-decrescendo cycles followed by apneas.

Treatment approach that uses controlled manipulation of sleep-wake timing to treat circadian rhythm disorders.

The internal biological clock that regulates the sleep-wake cycle and other physiological processes over approximately 2...

Sleep-wake disorders caused by misalignment between internal biological clocks and external environmental schedules.

A parasomnia characterized by disorientation and confusion during partial awakening from deep sleep.

Continuous positive airway pressure therapy device that delivers pressurized air to keep airways open during sleep.

An overnight study to determine the optimal CPAP pressure setting for treating sleep apnea.

Slow brain waves (0.5-2 Hz) characteristic of deep NREM sleep stages.

Alternative term for REM sleep, referring to the desynchronized brain wave patterns observed during this stage.

A standardized 30-second segment used for sleep stage scoring in polysomnography.

Benign parasomnia characterized by loud noise hallucinations during sleep-wake transitions, often described as explosive...

A simplified sleep monitoring device used at home to diagnose obstructive sleep apnea.

Excessive daytime sleepiness or prolonged nighttime sleep that significantly impairs daily functioning despite adequate...

Vivid, often frightening sensory experiences that occur during the transition from wakefulness to sleep.

Graphical representation of sleep stages over time, showing the progression through different phases of sleep.