[Intraoperative mapping of motor areas during brain tumor surgery: electrical stimulation patterns].
Brain mapping with direct electrical stimulation is usefull when the tumor is located near or has infiltrated the central lobe.


OBJECTIVE
To analyze the surgical findings with direct electrical stimulation of the cortex and white matter under general anesthesia during surgery for brain tumors related to the central lobe.


METHODS
We studied 42 patients operated on from June 2000 to June 2003. We analyzed surgical findings and details of brain mapping.


RESULTS
The mean value of the intensity of the stimulus was greater among those who presented motor deficit prior to surgery (p = 0.0425) and edema on MRI (p = 0.0468) or during anesthesia with continuous propofol (p = 0.001).


CONCLUSIONS
The functional mapping of the central lobe may be influenced by severe motor deficit, edema on MRI and propofol's anesthesia.
Brainer-Lima
Paulo Thadeu
PT
Hospital da Restauração, Universidade de Pernambuco, Recife, PE, Brazil. brainerlima@aol.com
Brainer-Lima
Alessandra Mertens
AM
Brandt
Carlos Texeira
CT
Carneiro
Geraldo Sá
GS
Azevedo
Hildo C
HC
D000293:Adolescent; D000328:Adult; D000368:Aged; D018686:Anesthetics, Intravenous / Q000008:administration & dosage; D001931:Brain Mapping; D001932:Brain Neoplasms / Q000601:surgery*; D002648:Child; D003399:Craniotomy / Q000379:methods*; D004558:Electric Stimulation / Q000379:methods*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D009044:Motor Cortex; D015742:Propofol / Q000008:administration & dosage
D018686:Anesthetics, Intravenous; D015742:Propofol