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Cranial movement disorders: clinical features, pathophysiology, differential diagnosis and treatment

Abstract

Cranial movement disorders are a common neurological problem. These disorders can be limited to the cranial muscles alone or manifest as part of a more generalized movement disorder. Cranial movement disorders can originate from the highest (motor cortex) to the lowest (cranial nerve and muscle) levels of the motor system. Owing to the lack of diagnostic tests and biomarkers for these disorders, their differential diagnosis can be difficult even for the experienced neurologist. Advances have, however, been made in the identification and treatment of these conditions, and most can be managed effectively with appropriate knowledge of the diagnostic signs and effective treatments. Here, we review the clinical features, pathophysiologies and therapies of the main movement disorders that affect the face, jaw, tongue and palate.

Key Points

  • Cranial movement disorders can be specific to the facial muscles or part of a generalized movement disorder

  • Cranial movement disorders can be generated by peripheral or central mechanisms

  • Neurophysiological and neuroimaging studies provide important insight into the pathophysiology of these disorders

  • The differential diagnosis of cranial movement disorders is made mainly on the basis of clinical characteristics, although neurophysiological and neuroimaging studies can also be of help

  • Treatment of the underlying disorder is mandatory when cranial movement disorders are part of a generalized disease

  • Botulinum neurotoxin is an effective symptomatic treatment in most focal cranial movement disorders

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Figure 1: Images of a patient affected by blepharospasm.

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Fabbrini, G., Defazio, G., Colosimo, C. et al. Cranial movement disorders: clinical features, pathophysiology, differential diagnosis and treatment. Nat Rev Neurol 5, 93–105 (2009). https://doi.org/10.1038/ncpneuro1006

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