title: fMRI and DTI assessment of patients undergoing radical epilepsy surgery.
abstract: Hemispherectomy is effective for young patients suffered from unilateral cortical disease and severe drug-resistant epilepsy, but a major concern for hemispherectomy is the remaining brain functions and function recovery in patients after such surgery. In this study, seven patients were evaluated with clinical and imaging assessment pre- and post-surgery. Among them, four underwent anatomic hemispherectomy (AH) and three underwent subtotal hemispherectomy (functional hemispherectomy, FH). After the surgery, 71.4% (5/7) patients [(4/4) with AH and (1/3) with FH] became seizure free (Engel class I). Motor function of the paretic upper extremity unchanged in 4 patients and deteriorated in 3. Functional imaging results indicated that relocation of hand motor function (to the ipsilateral hemisphere) could take place before or after the surgery, or did not occur. Similar observations were made in the motor cortex activation on the paretic foot movement. In addition, both the affected and unaffected hemispheres underwent post-surgical changes in the corticospinal tracks (CST) in various degrees, but significant reinforcement of the CST in the remaining unaffected hemisphere was not evident. Further research is needed to reveal the true functional and structural changes of the remaining brain after surgery and to explore the mechanisms of such functional relocation and reorganization in patients underwent hemispherectomy.
authors: School of Biomedical Engineering, Capital Medical University, Beijing 100069, PR China. jzhang0000@163.com
authors: Jing
authors: J
authors: Zhang
authors: Shanshan
authors: S
authors: Mei
authors: Qingzhu
authors: Q
authors: Liu
authors: Weifang
authors: W
authors: Liu
authors: Hui
authors: H
authors: Chen
authors: Hong
authors: H
authors: Xia
authors: Zhen
authors: Z
authors: Zhou
authors: Lei
authors: L
authors: Wang
authors: Yunlin
authors: Y
authors: Li
mesh_terms: D000293:Adolescent; D002540:Cerebral Cortex / Q000503:physiopathology; D002648:Child; D004827:Epilepsy / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006225:Hand / Q000503:physiopathology*; D038421:Hemispherectomy / Q000379:methods; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D020127:Recovery of Function; D055815:Young Adult