Posterior Displacement of the Motor Blood Oxygen Level‐Dependent Functional MRI Signal into the Postcentral Gyrus in Patients with Preoperative Brain Tumor and Healthy Volunteers: Practical Guidelines to Correctly Interpret Functional MRI Findings
Blood oxygen level‐dependent functional MRI is a useful method for mapping functional cortices in preoperative patients with brain tumor. However, motor functional MRI activation is occasionally displaced from the precentral gyrus into the postcentral gyrus; this displacement
could lead to errors in the interpretation of eloquent cortices in patients with brain tumor. Being aware of this phenomenon and using the guidelines, one will be able to correctly identify the precentral (motor) gyrus by using functional MRI even in cases of displacement.
Keywords: AFNI = Analysis of Functional NeuroImages, Version 4.12; AP = anteroposterior; BOLD fMRI = Blood oxygenation level-dependent functional MR imaging; L-R = left-right; SPM = statistical parametric mapping; SSEP = somatosensory evoked potential
Document Type: Research Article
Publication date: June 1, 2013
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