Figure 1.

Diagrams of testing regions on the chests of the targeted reinnervation amputees. (A) TR1, Male bilateral shoulder disarticulation amputee. (B) TR2, female unilateral short trans-humeral amputee (functional shoulder disarticulation). The dashed line surrounding the light grey area on the left chest of the amputees denotes the extent of sensation that is referred to the missing limb. Within the light grey area the amputees feel a mix of referred hand sensation and native chest sensation. The white area denotes where the targeted reinnervation amputees feel only referred hand sensation with no native chest sensation. The crossed arrows show the vertical and horizontal axes of the grating placements for the grating orientation task. The Y shaped lines denote the placement of the grids used for the point localization task.