The etiology of idiopathic orofacial dystonia is yet unknown. Neurophysiological and functional imaging studies indicated that a somatosensory dysfunction could play an important role in the pathophysiology of focal dystonia.
We used functional magnetic resonance imaging (fMRI) to explore abnormal central sensory processing of tactile stimuli applied by a fully automated stimulation device to the forehead, upper lips and hands before and after treatment with botulinum toxin (BTX) in patients with Blepharospasm or Meige's syndrome.
Stimulation of the clinically affected face, but also of the unaffected right hand, yielded abnormal primary and secondary somatosensory cortex activations in patients. BTX treatment modulated activation of the basal ganglia and thalami.
These findings underline the importance of the somatosensory system in the pathophysiology of orofacial dystonia. BTX seems to modulate subcortical sensory processing.
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The etiology of idiopathic orofacial dystonia is yet unknown. Neurophysiological and functional imaging studies indicated that a somatosensory dysfunction could play an important role in the pathophysiology of focal dystonia.
We used functional magnetic resonance imaging (fMRI) to explore abnormal central sensory processing of tactile stimuli applied by a fully automated stimulation device to the forehead, upper lips and hands before and after treatment with botulinum toxin (BTX) in patients w...
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