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AJNR - American Journal of Neuroradiology

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Functional Heterogeneity of the Supplementary Motor Area

Gyung Ho Chung^a,b, Young Min Han^a, Su Hyun Jeong^a and Clifford R. Jack, Jr.^b

^a Department of Diagnostic Radiology, Chonbuk National University Medical School, Jeonju, Jeonbuk, Korea
^b Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN

View larger version (71K): [in a new window]   FIG 1. Functional MR images showing activation in the supplementary motor area during motor (A), sensory (B), word generation (C), working memory (D), and listening comprehension (E) tasks in volunteer 13. Volume-rendered functional MR images showing activation in the SMA for the entire group are illustrated for the motor (F), sensory (G), word generation (H), working memory (I), and listening comprehension (J) tasks.

View larger version (105K): [in a new window]   FIG 2. Sagittal functional MR group maps of complex motor, hot sensory, listening comprehension, word generation, and working memory tasks. Functional MR images showing SMA activation during complex motor (red), heat sensory (yellow), word generation (green), and working memory (blue) tasks. The rostral aspect of the SMA tended to activate during word generation and working memory tasks, and the caudal aspect of the SMA during motor and sensory tasks. These differences, however, did not reach statistical significance.

View larger version (86K): [in a new window]   FIG 3. Axial functional MR group maps of complex motor (red), heat sensory (yellow), listening comprehension (magenta), word generation (green), and working memory (blue) tasks. Right (contralateral) SMA activation was observed during motor, and sensory tasks, and left SMA activation during word generation and memory tasks.