Perceptual correlates of massive cortical reorganization.
Ramachandran VS; Stewart M; Rogers-Ramachandran DC.
Neuroreport, 1992 Jul, 3(7):583-6.
Following long-term deafferentation of one upper limb in adult
primates, the cortical areas corresponding to that limb become responsive to
stimuli applied to the face. To explore this phenomenon, we studied some
patients after upper limb amputation. In patient VQ, stimuli applied to the
lower face or 7 cm above the stump evoked precisely localized referred
sensations in individual digits which were often modality specific.
Similarly, in another patient, WK several complete somatotopic
representations of the phantom limb were found, on the face, chest and
axilla, indicating the emergence of such maps in regions remote from the
stump. These effects may be a direct perceptual correlate of the
physiological observations of Merzenick et al (1984), Wall (1977) and Pons
et al (1991).