The neurophysiology of focal hand dystonia in musicians
This chapter discusses the neurophysiology of focal hand dystonia in musicians. Studies of focal hand dystonia reveal abnormalities in three main areas: (1) reduced excitability of inhibitory connections at all levels (spinal, brainstem, and cortical) of the motor system; (2) reduced sensory perception and integration; and (3) impaired sensorimotor organization/integration. It also presents the results of a study describing neurophysiological differences between writer's cramp and musician's dystonia and discusses the implications of these findings for the pathophysiology of these two forms of focal hand dystonia.
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