AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Feb 1998
Functional MR imaging of cortical activation of the cerebral hemispheres during motor tasks.
We used functional MR imaging to evaluate cortical activation in the precentral, central, and postcentral regions of the contralateral and ipsilateral cerebral hemispheres during left- and right-handed motor tasks. ⋯ Our results confirmed those of previous investigators that ipsilateral activation is more pronounced during left-sided movements than during right-sided movements. The variation in activation of the precentral, central, and postcentral subregions suggests different roles of the ipsilateral and contralateral hemispheres during motor tasks.
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Our purpose was to describe the MR findings and evolution of spinal cord abscess and to define those MR features that allow differentiation of cord infection from other intramedullary abnormalities. ⋯ A characteristic sequence of imaging findings aids in the differentiation of cord infection from other intramedullary lesions.