Figure 5.

Representations of ipsilateral fingers during unimanual and bimanual actions. (A) Surface maps of the classification accuracy for the ipsilateral finger (40% accuracy threshold, Z = 1) during unimanual (upper row) and bimanual (lower row) finger presses. (B) Predicted accuracies, assuming that contra- and ipsilateral patterns superimpose linearly. (C) Observed classification accuracy in informative subregions (see Materials and Methods) of 3 anatomical ROIs for contralateral (red) and ipsilateral (blue) fingers. Results are averaged across the 2 hemispheres. Error bars represent across-subject standard error of the mean. (D) Spatial relationship of areas encoding the contralateral (50% threshold, red) and ipsilateral fingers (40% threshold, blue) during bimanual actions. Circles indicate the individual COGs of the functional finger ROI of the precentral and postcentral gyri. CS, central sulcus; SFS, superior frontal sulcus.