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Visual perseveration in temporal lobe epilepsy.

M Swash

    Journal of Neurology, Neurosurgery, and Psychiatry
    |June 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Ictal visual perseveration, a rare symptom in temporal lobe epilepsy, was observed in two patients. This condition is distinct from palinopsia, which involves visual image recurrence.

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    Area of Science:

    • Neurology
    • Epileptology
    • Clinical Neuroscience

    Background:

    • Temporal lobe epilepsy (TLE) is a common focal epilepsy.
    • Ictal phenomena can manifest in diverse ways, including complex visual disturbances.
    • Understanding subtle ictal symptoms is crucial for accurate diagnosis and localization.

    Observation:

    • Two patients with medically refractory temporal lobe epilepsy presented with ictal visual perseveration.
    • The perseveration involved a persistent visual percept that interfered with ongoing visual processing.
    • Careful phenomenological description differentiated this from other visual phenomena.

    Findings:

    • Ictal visual perseveration represents a distinct ictal manifestation in temporal lobe epilepsy.
    • This symptom was differentiated from palinopsia, characterized by the recurrence of a visual image.

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  • The findings suggest specific neurophysiological underpinnings for perseverative phenomena during seizures.

    • Implications:

    • Recognition of ictal visual perseveration can aid in seizure localization within the temporal lobe.
    • Distinguishing perseveration from palinopsia refines the understanding of visual ictal phenomena.
    • Further research into the mechanisms of visual perseveration may offer new therapeutic targets.