Journal of Sleep Research
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Glossary of Sleep-related terms
- Abdominal Movement
- Absence, typical (Classical or petit mal absence)
- Acrophase
- Action tremor
- Active sleep
- Activity (also activity episode)
- Activity onset
- Adenosine
- Adrenal
- Advanced Sleep Phase Syndrome
- Airflow Limitation (Flow Limitation)
- Alpha Sleep
- Alpha-Delta Sleep
- Ambulatory Monitor
- Amines, biogenic
- Amitriptyline
- Amphetamine sulphate
- Amplitude
- Analog computer
- Antidepressant
- Apnea
- Apnea Index
- Apnea/Hypopnea Index
- Arousal
- Arousal Disorder
- Arousal epilepsy
- Arousal Threshold
- Arrhythmia
- Asymmetry
- Atonia
- Atropine
- Auto Adjusting Continuous Positive Airway Pressure Device (SmartPAP)
- Automatism
- Awakening
Asymmetry
1. Of a wave or deflection: Unequal amplitude on either side of a baseline; 2. Of a record: Significant difference in amplitude or frequency of two traces taken simultaneously from the two hemispheres under identical conditions of recordings.4