Somatotopically located motor fibers in corona radiata: evidence from subcortical small infarcts.
Using T2-weighted MRI, we measured the relative anteroposterior distance of small corona radiata infarcts in 54 patients who had disproportionate weakness in the bulbar (Group A), arm (Group B), and leg (Group C) muscles. The lesions were differently (p < 0.01) located: Group A, most were located anteriorly; Group B, most were in the middle; and Group C, most were located posteriorly. These results suggest that motor fibers are somatotopically arranged in the human corona radiata.
Kim
Jong S
JS
Department of Neurology, University of Ulsan, Asan Medical Center, Seoul, South Korea. jongskim@amc.seoul.kr
Pope
Amy
A
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001132:Arm / Q000294:innervation / Q000503:physiopathology; D001259:Ataxia / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D016893:Carotid Stenosis / Q000473:pathology / Q000503:physiopathology; D002544:Cerebral Infarction / Q000473:pathology* / Q000503:physiopathology; D038524:Diffusion Magnetic Resonance Imaging; D005152:Facial Muscles / Q000294:innervation / Q000503:physiopathology; D005260:Female; D006801:Humans; D020244:Infarction, Middle Cerebral Artery / Q000473:pathology / Q000503:physiopathology; D020772:Internal Capsule / Q000473:pathology* / Q000502:physiology; D007866:Leg / Q000294:innervation / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009044:Motor Cortex / Q000473:pathology* / Q000502:physiology; D009413:Nerve Fibers, Myelinated / Q000473:pathology*; D010291:Paresis / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D011712:Pyramidal Tracts / Q000473:pathology* / Q000502:physiology