title: 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.affiliation: Department of Neurology, Graduate School of Medicine, Kyoto University, 54 Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan.
authors.forename: Takakuni
authors.initials: T
authors.lastname: Maki
authors.forename: Riki
authors.initials: R
authors.lastname: Matsumoto
authors.forename: Nobuo
authors.initials: N
authors.lastname: Kohara
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kondo
authors.forename: Insuk
authors.initials: I
authors.lastname: Son
authors.forename: Takahiro
authors.initials: T
authors.lastname: Mezaki
authors.forename: Ichizo
authors.initials: I
authors.lastname: Nishino
authors.forename: Akio
authors.initials: A
authors.lastname: Ikeda
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D004576:Electromyography / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009135:Muscular Diseases / Q000175:diagnosis / Q000503:physiopathology