Spinal segmental myoclonus resembling “belly dance” in a pregnant woman

Myoclonus is a movement disorder with a wide differential diagnosis (Shibasaki, 2006) but with common semiological elements: sudden, brief, jerky movements, caused by muscle contraction or inhibition of ongoing muscle activity. Myoclonus can be classified by presumed site of origin into cortical, cortical-subcortical, subcortical-supraspinal, spinal and peripheral (Shibasaki, 2006). Neurophysiologic studies help confirm clinical diagnosis and understand underlying physiological mechanisms.

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