sleep-wake transition
The physiological process of changing from sleep to wakefulness or vice versa.
Full Definition
Sleep-wake transition encompasses the complex neurophysiological processes that occur during the shift between sleep and wake states. These transitions involve coordinated changes in brain wave activity, neurotransmitter release, muscle tone, and autonomic nervous system function. Normal transitions should be smooth and complete, but can be disrupted in various sleep disorders, leading to phenomena like sleep inertia, partial arousals, or incomplete awakening. Abnormal sleep-wake transitions can manifest as difficulty falling asleep, frequent awakenings, or problems with morning alertness.
Usage
Usage note: Broader concept than 'sleep onset' or 'awakening'; encompasses the entire transition process.
In Context
- "Disturbed sleep-wake transitions were evident throughout the night, with multiple incomplete arousals." — Polysomnography interpretation
- "The patient's medication regimen may be affecting normal sleep-wake transition mechanisms." — Treatment review