Hypervigilance is a term from psychology and means increased alertness or alertness . It leads to greatly increased arousal and is therefore the opposite of hypovigilance , the term for increased sleepiness . The general generic term for the two opposing forms is vigilance .
However, since vigilance is also understood as alertness, hypervigilance can also be used for increased alertness . Accordingly, hypovigilance also means reduced attention .
Hypervigilance is one of the symptoms that occurs with obsessive-compulsive disorder or post-traumatic stress disorder . Hypovigilance, on the other hand, can be observed in connection with hypnagogic hallucinations, under vigilance-influencing drugs, under sleep deprivation or in delirium with disorders of consciousness and disorders of the day-night rhythm.