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. Author manuscript; available in PMC: 2007 Sep 27.

Published in final edited form as: Neuroimage. 2007 Jan 16;35(1):140–148. doi: 10.1016/j.neuroimage.2006.11.009

Local synchrony patterns and clinically identified epileptogenic zones (red boxes) in subdural grid recordings of Patients 4 – 9. The grid maps are as described in Figures 2 and 3. a) Local hypersynchrony over well-defined structural lesions (Patients 4 and 5). The lesions are indicated by the hatched outlined areas. b) LH regions in the anterior temporal region (Patient 6) and parietal lobes (Patients 6 and 7). The red boxed area in Patient 6 was included in the resection, while no neocortical areas were resected in Patient 7. c) LH regions in nonlesional frontal lobe epilepsy (Patients 8 and 9). Note the relative locations of the LH regions and epileptogenic zones in Patient 8. Patient 9’s LH regions indicated a surprising degree of focality given the widespread activity on the EEG. Based on the EEG findings, Patient 9 underwent two resections: lateral temporal lobe anterior to a language-critical area found on neurostimulation mapping, and a near-complete functional frontal lobectomy sparing primary motor and Broca’s area. The language-critical areas are shown traced in yellow.

Local synchrony patterns and clinically identified epileptogenic zones (red boxes) in subdural grid recordings of Patients 4 – 9. The grid maps are as described in Figures 2 and 3. a) Local hypersynchrony over well-defined structural lesions (Patients 4 and 5). The lesions are indicated by the hatched outlined areas. b) LH regions in the anterior temporal region (Patient 6) and parietal lobes (Patients 6 and 7). The red boxed area in Patient 6 was included in the resection, while no neocortical areas were resected in Patient 7. c) LH regions in nonlesional frontal lobe epilepsy (Patients 8 and 9). Note the relative locations of the LH regions and epileptogenic zones in Patient 8. Patient 9’s LH regions indicated a surprising degree of focality given the widespread activity on the EEG. Based on the EEG findings, Patient 9 underwent two resections: lateral temporal lobe anterior to a language-critical area found on neurostimulation mapping, and a near-complete functional frontal lobectomy sparing primary motor and Broca’s area. The language-critical areas are shown traced in yellow.