• Annals of neurology · Jan 2008

    Case Reports

    Memory enhancement induced by hypothalamic/fornix deep brain stimulation.

    • Clement Hamani, Mary Pat McAndrews, Melanie Cohn, Michael Oh, Dominik Zumsteg, Colin M Shapiro, Richard A Wennberg, and Andres M Lozano.
    • Division of Neurosurgery, Toronto Western Hospital and Research Institute, University of Toronto, Toronto, Ontario, Canada.
    • Ann. Neurol. 2008 Jan 1;63(1):119-23.

    AbstractBilateral hypothalamic deep brain stimulation was performed to treat a patient with morbid obesity. We observed, quite unexpectedly, that stimulation evoked detailed autobiographical memories. Associative memory tasks conducted in a double-blinded "on" versus "off" manner demonstrated that stimulation increased recollection but not familiarity-based recognition, indicating a functional engagement of the hippocampus. Electroencephalographic source localization showed that hypothalamic deep brain stimulation drove activity in mesial temporal lobe structures. This shows that hypothalamic stimulation in this patient modulates limbic activity and improves certain memory functions.

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