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"Ictal" Alien Hand Syndrome.

E Carrazana, G Rey, R Rivas-Vazquez

    Epilepsy & Behavior : E&B
    |March 1, 2003
    PubMed
    Summary
    This summary is machine-generated.

    Alien hand syndrome, a rare neurological condition, was observed only during seizures in a woman with a frontal lobe glioma. This suggests seizures can temporarily disrupt brain connections, causing alien hand symptoms.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Cognitive Science

    Background:

    • Alien hand syndrome (AHS) is a rare neurological disorder characterized by a limb moving involuntarily.
    • It is typically associated with lesions in the mesial frontal lobe and corpus callosum, indicating a disconnection syndrome.

    Purpose of the Study:

    • To report an unusual case of alien hand syndrome presenting exclusively during seizures.
    • To investigate the potential mechanism of seizure-induced alien hand syndrome in a patient with a frontal lobe glioma.

    Main Methods:

    • Case report of a 65-year-old woman with a presumed low-grade glioma.
    • Clinical observation of alien hand symptoms occurring solely during epileptic seizures.
    • Neuropsychological evaluation to assess cognitive function and lesion localization.

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    Main Results:

    • The patient exhibited alien hand syndrome exclusively during seizure activity.
    • Neuropsychological testing revealed lateralized cognitive dysfunction corresponding to the lesion site.
    • No interictal signs of disconnection syndrome were observed between seizures.

    Conclusions:

    • Seizure propagation across the corpus callosum may transiently disrupt motor control pathways.
    • This case highlights a unique presentation of alien hand syndrome, distinct from typical lesion-induced AHS.
    • The findings suggest seizures can induce temporary alien hand phenomena by interfering with interhemispheric motor connections.