Potentials of Ultrahigh-Field MRI for the Study of Somatosensory Reorganization in Congenital Hemiplegia

Figure 3

S1 dislocation vectors of each patient for the gentle tactile stimulation of both nondominant (pink vectors) and dominant (cyan vectors) hands, projected in sagittal (a), coronal (b), and axial (d) planes. The yellow point represents the position of S1 resulting from the group analysis ( = −57,  = −17, ) and is set to zero. The sphere of expected localization (<1.5 standard deviation (SD)) in control brains (grey) has radius  = 11.5 mm. Color code of axis respects the convention [] → RGB ( = red,  = green,  = blue). Axis scales are in millimeters. In the bottom-left corner (c), the three dimensional representation of S1 control group ROI (yellow) is overlapped on the mesh of the white/grey matter boundary of a standard brain (Colin27 brain, [24]). All dominant hand vectors are within a 1.5 SD, as well as 2 out of 6 hemiplegic subjects. Not the posterior-mesial gradient for S1 dislocation.

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