Neural
plasticity is the basis for an adaptation process of functional and
structural characteristics of the nervous system in response to a
changing environment. However, changes during training in healthy
volunteers are only partially comparable to that observed in patients
with circumscribed lesions. Pathologies can even be associated with
maladaptive plasticity. We first introduce basic processes underlying
brain plasticity with respect to the sensorimotor system and outline
their limitations. A number of methods showing potential in the
evaluation of these processes are compared before literature on
postlesional plasticity is reviewed. Approaches in monitoring plasticity
processes of the healthy sensorimotor system are partially applicable
after brain damage and for the documentation of recovery processes. Some
of these techniques can further be used for outcome prediction or
therapy selection and optimization. Extreme examples from athletes or
professional musicians illustrate the amount of plastic changes the
human brain can achieve. Profound understanding of neural plasticity in
health and disease will help to modify and individually optimize therapy
strategies in neurorehabilitation.
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