How is "arousal" defined in the context of sleep studies?

In the context of sleep studies, "arousal" is defined as a brief awakening from sleep, which is the correct interpretation. Arousal can occur at various points during the sleep cycle and may not necessarily be associated with a complete waking state; it can often refer to a transient shift in EEG activity, showing a heightened state of alertness, even if the individual does not fully wake up. This phenomenon can influence sleep architecture and overall sleep quality.

Understanding this definition is crucial for interpreting polysomnographic data correctly, as it helps identify disturbances in sleep patterns, which can be significant indicators of sleep disorders.