Chapter

Brainstem myoclonus and startle syndromes

Ivan Donaldson, C. David Marsden, Susanne A. Schneider and Kailash P. Bhatia

in Marsden's Book of Movement Disorders

Published on behalf of Oxford University Press

ISBN: 9780192619112
Published online January 2012 | e-ISBN: 9780199698103 | DOI: http://dx.doi.org/10.1093/med/9780192619112.003.0829
Brainstem myoclonus and startle syndromes

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Focal myoclonus arising in the spinal cord and cerebral cortex was described in Chapter 29. The only form of focal myoclonus arising in the brainstem that was referred to was palatal myoclonus (also referred to as palatal tremor). There are, however, entirely different types of myoclonus that arise from the brainstem reticular formation, which take the form of generalized, predominantly axial body jerks. Two types have been identified: 1 Brainstem reticular myoclonus, in which jerks occur spontaneously and can be triggered by external stimuli (brainstem reticular reflex myoclonus).

2 Exaggerated startle syndromes, in which the myoclonus is precipitated by sudden external stimuli such as a noise, a flash of light, or a touch to the body. These are the topics of this chapter.

Chapter.  11603 words.  Illustrated.

Subjects: Neurology

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