Pathophysiology of dystonia
Understanding of the pathophysiology of dystonia derives primarily from studies of focal dystonias. Physiological investigations have revealed a number of abnormalities that may reflect the genetic substrate that predisposes certain individuals to develop dystonia. There is a loss of inhibition in the central nervous system, and a loss of surround inhibition specifically. Plasticity is increased, and there are sensory abnormalities. Which of these disorders is primary is uncertain.
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