Relevant Principal Components – Involved Activation Areas.

MI, primary motor cortex, CMA, cingular motor area; SI, primary sensory cortex; SPL, superior parietal lobule; SMA, supplementary motor area; STP, superior temporal plane; g., gyrus; c., cortex; nc., nucleus; s., sulcus; R, right; L, left. *Max. Load = greatest voxel value within a cluster, representing the contribution to a defined PC. **according to categorical comparisons; + = increase of blood flow, − = decrease of blood flow.