Somatosensory phenomena elicited by electrical stimulation of hippocampus: Insight into the ictal network.
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2020
- doi: 10.1016/j.ebr.2020.100387
- issn: 2589-9864
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ebr.2020.100387
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info:eu-repo/semantics/altIdentifier/pmid/32995741
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info:eu-repo/semantics/altIdentifier/eissn/2589-9864
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info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_B60FBD3E41DA9
info:eu-repo/semantics/openAccess , CC BY-NC-ND 4.0 , https://creativecommons.org/licenses/by-nc-nd/4.0/
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T. Vinding Merinder et al., « Somatosensory phenomena elicited by electrical stimulation of hippocampus: Insight into the ictal network. », Serveur académique Lausannois, ID : 10.1016/j.ebr.2020.100387
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Up to 11% of patients with mesial temporal lobe epilepsy experience somatosensory auras, although these structures do not have any somatosensory physiological representation. We present the case of a patient with left mesial temporal lobe epilepsy who had somatosensory auras on the right side of the body. Stereo-EEG recording demonstrated seizure onset in the left mesial temporal structures, with propagation to the sensory cortices, when the patient experienced the somatosensory aura. Direct electrical stimulation of both the left amygdala and the hippocampus elicited the patient's habitual, somatosensory aura, with afterdischarges propagating to sensory cortices. These unusual responses to cortical stimulation suggest that in patients with epilepsy, aberrant neural networks are established, which have an essential role in ictogenesis.