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Effects of anterior temporal lobectomy on cognitive function.

R J Ivnik, F W Sharbrough, E R Laws

    Journal of Clinical Psychology
    |January 1, 1987
    PubMed
    Summary

    Anterior temporal lobectomy significantly improved seizure control in epilepsy patients. However, left temporal lobe surgery impacted language and memory, while right temporal lobe surgery showed neutral to improved cognitive function.

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    Surgical outcome and predictive factors in adult patients with intractable epilepsy and focal cortical dysplasia.

    Acta neurologica Scandinavica·2006

    Area of Science:

    • Neurosurgery
    • Epilepsy Research
    • Cognitive Neuroscience

    Background:

    • Intractable partial complex epilepsy poses significant challenges for seizure control.
    • Anterior temporal lobectomy is a surgical option for refractory epilepsy.
    • Understanding the cognitive impact of temporal lobe resections is crucial.

    Purpose of the Study:

    • To evaluate the efficacy of anterior temporal lobectomy in controlling intractable partial complex epilepsy.
    • To assess the effects of anterior temporal lobectomy on cognitive functions.
    • To differentiate the cognitive outcomes based on the side of temporal lobe excision.

    Main Methods:

    • Sixty-three patients with intractable partial complex epilepsy underwent anterior temporal lobectomy.
    • Pre- and post-operative psychometric assessments were conducted to evaluate cognitive function.

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  • Patients were followed up for a mean of 7.7 months.

    • Main Results:

    • Sixty-two out of 63 patients (98%) experienced improved seizure control, with 78% becoming seizure-free.
    • Left temporal lobectomy resulted in decreased efficiency in language-dependent cognitive tasks, including complex learning and memory.
    • Right temporal lobectomy led to unchanged or slightly improved cognitive abilities.

    Conclusions:

    • Anterior temporal lobectomy is highly effective for seizure control in patients with intractable partial complex epilepsy.
    • The cognitive sequelae of temporal lobectomy differ based on the hemisphere of resection.
    • Future research should investigate specific learning and memory processes affected by temporal lobe ablations.