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• W2089968187 abstract "Precise delineation of pathological and eloquent cortices is essential in pre-neurosurgical diagnostics of epilepsy. A limitation of existing experimental procedures, however, is that they critically require active cooperation of the patient, which is not always achievable, particularly in infants and in patients with insufficient cognitive abilities. In the present study, we evaluated the potential of electrocorticographic recordings of high gamma activity during natural, non-experimental behavior of epilepsy patients to localize upper- and lower-extremity motor and language functions, and compared the results with those obtained using electrocortical stimulation. The observed effects were highly significant and functionally specific, and agreed well with the somatotopic organization of the motor cortex, both on the lateral convexity and in the supplementary motor area. Our approach showed a similar specificity and sensitivity for extremity movements as previously obtained from experimental data. We were able to quantify, for the first time, sensitivity and specificity of high gamma underlying non-experimental lower-extremity movements in four patients, and observed values in the same range as for upper extremities (analyzed in six patients). Speech-related responses in the three investigated patients, however, exhibited only a very low sensitivity. The present findings indicate that localization of not only upper- but also lower-extremity movements congruent with electrocortical stimulation mapping is possible based on event-related high gamma responses that can be observed during natural behavior. Thus, non-experimental mapping may be usefully applied as adjunct to established clinical procedures for identification of both upper- and lower-extremity motor functions." @default.
• W2089968187 created "2016-06-24" @default.
• W2089968187 creator A5001967683 @default.
• W2089968187 creator A5007359982 @default.
• W2089968187 creator A5045843456 @default.
• W2089968187 creator A5049330818 @default.
• W2089968187 creator A5069449813 @default.
• W2089968187 creator A5083765806 @default.
• W2089968187 date "2013-11-01" @default.
• W2089968187 modified "2023-10-14" @default.
• W2089968187 title "Somatotopic mapping of natural upper- and lower-extremity movements and speech production with high gamma electrocorticography" @default.
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