Identification of the sensorimotor cortex with functional MRI: frequency and actual contribution in a neurosurgical context

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
Jesus PujolGerardo Conesa

Abstract

We assessed the actual frequency of motor functional MRI (fMRI) in a neurosurgical environment and estimated the extent to which it aided surgeons' identifications of the sensorimotor cortex. During five consecutive years, an fMRI protocol aimed at generating a selective activation of the hand cortical area was prescribed to 147 patients showing a centrally located space-occupying lesion, which represents 6.7% of all assisted surgical candidates showing an intracranial mass. Three senior neurosurgeons indicated the position of the sensorimotor cortex on two different anatomical displays, reporting confidence ratings for each decision. The sensorimotor cortex could not be identified in 16.5% of cases using conventional anatomical MRI, and in 15% of cases using 3-dimensional reconstructions. In an additional 12.5% of cases, the neurosurgeons were not confident when they correctly identified the sensorimotor cortex. The tumor distorting effect on central region anatomy significantly contributed to sensorimotor cortex misidentification. fMRI, by contrast, showed a selective activation indicating the position of the sensorimotor cortex in all but 4% of cases. In our neurosurgical environment, fMRI was prescribed to a selected group ...Continue Reading

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Citations

Nov 26, 2009·Pediatric Radiology·James L Leach, Scott K Holland
Jan 1, 2013·Brain Topography·Mathieu BourguignonXavier De Tiège
Dec 3, 2014·Neuroimaging Clinics of North America·Meredith GabrielAndrei I Holodny
Sep 28, 2010·Neuro-Chirurgie·M LonjonS Chanalet
Jan 3, 2015·Journal of Neurosurgery·Thomas FrigeriAlbert L Rhoton
Apr 15, 2018·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·D ParésL Grande
Jun 24, 2009·Nature Reviews. Clinical Oncology·Adam D WaldmanUNKNOWN National Cancer Research Institute Brain Tumour Imaging Subgroup

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