title: [Postoperative transient hemiplegia after resection of the medial frontal tumor involving the supplementary motor area: report of two cases].
abstract: The supplementary motor cortex (SMA) is located anterior to the primary motor cortex, and is considered to play an important role in planning, initiating and maintaining sequential motor actions. Disturbance of this area sometimes causes severe contralateral hemiplegia. If the disturbance doesn't affect the primary motor cortex, motor function will recover in relatively early postoperative time. We encountered two cases in which the patients developed postoperative severe hemiplegia after resection of a medial frontal lobe glioma, although there was no apparent change shown in the monitoring of intraoperative motor evoked potential (MEP). Both cases recovered from hemiplegia in the early postoperative period. In our cases, the disturbances of SMA were considered to be the causes of the development of transient hemiplegia. Intraoperative MEP monitoring is useful to distinguish the damage of the primary motor area from that of the SMA.
authors.affiliation: Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. khash@med.kyushu-u.ac.jp
authors.forename: Kimiaki
authors.initials: K
authors.lastname: Hashiguchi
authors.forename: Takato
authors.initials: T
authors.lastname: Morioka
authors.forename: Kimiko
authors.initials: K
authors.lastname: Fukui
authors.forename: Tadao
authors.initials: T
authors.lastname: Kawamura
authors.forename: Tadahisa
authors.initials: T
authors.lastname: Shono
authors.forename: Tomio
authors.initials: T
authors.lastname: Sakaki
mesh_terms: D000328:Adult; D001254:Astrocytoma / Q000473:pathology / Q000601:surgery*; D001932:Brain Neoplasms / Q000473:pathology / Q000601:surgery*; D019054:Evoked Potentials, Motor / Q000502:physiology; D005260:Female; D006429:Hemiplegia / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009044:Motor Cortex / Q000473:pathology*; D011183:Postoperative Complications / Q000175:diagnosis