Slow rolling eye movements are typically observed during which state?

Slow rolling eye movements are commonly associated with the drowsiness state, which is characterized by a decreased level of alertness and cognitive function. During this phase, individuals may be transitioning between wakefulness and sleep, leading to variations in brain activity typically observable on an electroencephalogram (EEG).

In the drowsiness state, one may experience a blend of alpha wave activity that is indicative of relaxation, and slower frequencies that signify the onset of sleep. The presence of slow rolling eye movements often accompanies this blending state, as they are part of the body's natural approach toward sleep. This physiological phenomenon helps differentiate drowsiness from other states such as being alert or in deep sleep, where distinct eye movements or EEG patterns would be observed instead.