FIGURE 14-23 Cortical Reorganization When a hand amputee’s face is stroked lightly with a cotton swab (A), the person experiences the stroke as a light touch on the missing hand (B) as well as a touch to the face. The deafferented cortex forms a representation of the amputated hand on the face. As in the normal somatosensory homunculus, the thumb is disproportionately large.

Information from V. S. Ramachandran (1993). Behavioral and magnetoencephalographic correlates of plasticity in the adult human brain. Proceedings of the National Academy of Sciences USA, 90, p. 10418.