Rippling is not always electrically silent in rippling muscle disease.

Abstract

Rippling muscle disease (RMD) is a myopathy with hyperirritability, the pathophysiology for which is uncertain.We report electromyographic findings in a 30-year-old man with RMD. Clinical features included muscle rippling and percussion-induced rapid muscle contractions. Both were associated with bursts of short-duration, low-amplitude spikes, which resembled single muscle fiber discharges. Our case stands in contrast to previously reported cases, which showed either electrical silence or motor unit potential discharges associated with rippling, and may represent muscle fiber hyperexcitability.

• Authors: Takakuni Maki, Riki Matsumoto, Nobuo Kohara, Takayuki Kondo, Insuk Son, Takahiro Mezaki, Ichizo Nishino, Akio Ikeda, Ryosuke Takahashi
• Journal: Muscle & nerve (Muscle Nerve) Vol. 43 Issue 4 Pg. 601-5 (Apr 2011) ISSN: 1097-4598 [Electronic] United States
• PMID: 21404291 (Publication Type: Case Reports, Journal Article)
• Copyright: Copyright © 2011 Wiley Periodicals, Inc.

Topics

• Adult
• Electromyography (methods)
• Female
• Humans
• Male
• Middle Aged
• Muscular Diseases (diagnosis, physiopathology)