The mechanisms of functional recovery ensuing focal brain lesions in m
an are poorly understood. Structural brain imaging has enabled a detai
led in vivo correlation of the clinical deficit and the anatomy of the
associated brain lesions. Functional neuroimaging allows for assessin
g determinants and features of cerebral reorganization related to func
tional restitution. Here, quantitative results of neuroimaging in stro
ke recovery, in adaptation to brain tumours, and in compensation of mo
tor neuronal degeneration are described. It will be shown that both, p
lastic changes of the cortical representation of function and the inte
grity of thalamic circuitry, are of crucial importance for recovery of
function. The observations of such studies may have a critical impact
for conceptual strategies in neurorehabilitation.