Identification of the sensorimotor cortex with functional MRI




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Details zur Publikation

Untertitel: frequency and actual contribution in a neurosurgical context
Autorenliste: Soriano-Mas C
Verlag: Wiley: 12 months / SAGE Publications (UK and US)
Jahr der Veröffentlichung: 2008
Zeitschrift: Journal of Neuroimaging (1051-2284)
Bandnummer: 18
Heftnummer: 1
Erste Seite: 28
Letzte Seite: 33
Seitenumfang: 6
ISSN: 1051-2284
eISSN: 1552-6569
Sprachen: Englisch-Vereinigtes Königreich (EN-GB)


BACKGROUND AND PURPOSE: 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. METHODS: 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. RESULTS: 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. CONCLUSIONS: In our
neurosurgical environment, fMRI was prescribed to a selected group of
surgical candidates showing a centrally located brain lesion. Compared
to conventional anatomical imaging, fMRI does appear to improve the
identification of sensorimotor cortex.


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Zuletzt aktualisiert 2019-13-08 um 00:45