visual perseveration
Abnormal persistence or recurrence of visual images after the stimulus has been removed, indicating cortical visual dysfunction.
Full Definition
Visual perseveration refers to the abnormal continuation or inappropriate recurrence of visual perceptions after the original visual stimulus has disappeared. This phenomenon can manifest as either immediate perseveration, where images linger longer than normal, or delayed perseveration, where previously seen images reappear spontaneously. The condition typically results from lesions affecting the visual cortex or associated areas and may be associated with seizure activity, migraine, or structural brain lesions. Visual perseveration differs from normal afterimages in its duration, complexity, and clinical context. Patients may find these persistent images distressing and functionally impairing, particularly when they interfere with new visual input.
Usage
Usage note: Often used interchangeably with palinopsia, though some authors distinguish between them.
In Context
- "The patient's visual perseveration made reading difficult as previous words would reappear over new text." — Clinical complaint
- "Visual perseveration following occipital stroke resolved gradually over several weeks." — Recovery documentation