Figure 4 —

Representative examples of pedaling-related brain activation. fMRI activation during pedaling in a (a) stroke and (b) control subject. A single axial and sagittal slice is shown for each subject to demonstrate the brain activation during passive and volitional pedaling. The same slices are depicted for passive and volitional pedaling. Color scale represents percent signal change compared with rest (0–5%). White arrows indicate anatomical landmarks. In the axial plane: long dash = precentral sulcus; solid line = central sulcus; short dash = postcentral sulcus. In the sagittal plane: long dash = marginal sulcus; solid line = cingulate sulcus; short dash = paracentral sulcus. fMRI = functional magnetic resonance imaging.