title: [Intraoperative mapping of motor areas during brain tumor surgery: electrical stimulation patterns].
abstract: 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.
authors.affiliation: Hospital da Restauração, Universidade de Pernambuco, Recife, PE, Brazil. brainerlima@aol.com
authors.forename: Paulo Thadeu
authors.initials: PT
authors.lastname: Brainer-Lima
authors.forename: Alessandra Mertens
authors.initials: AM
authors.lastname: Brainer-Lima
authors.forename: Carlos Texeira
authors.initials: CT
authors.lastname: Brandt
authors.forename: Geraldo Sá
authors.initials: GS
authors.lastname: Carneiro
authors.forename: Hildo C
authors.initials: HC
authors.lastname: Azevedo
mesh_terms: 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
chemical_list: D018686:Anesthetics, Intravenous; D015742:Propofol