Paroxysmal axial spasms of spinal origin

Abstract
A 55‐year‐old man with a 4½‐year history of paroxysmal bouts of involuntary large‐amplitude flexion jerks of the trunk and a 1‐year history of persistent rhythmic small‐amplitude movements of the anterior abdominal wall is described. Clinical and electrophysiological evidence suggested that the paroxysmal myoclonus arose in propriospinal systems intrinsic to the spinal cord.

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