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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Human leg neuromuscular diseases: P-31 MR spectroscopy.

Phosphorus-31 magnetic resonance (MR) spectra of leg muscles in patients with the neuromuscular diseases Duchenne dystrophy, myotonic dystrophy, postpoliomyelitis, Werdnig-Hoffmann disease, and pedal dystonia were recorded. Ratios of beta-adenosine triphosphate (ATP), inorganic phosphate (Pi), alpha-glycerophosphorylcholine (GPC), and phosphomonoesters to phosphocreatine (PCr) were calculated from peak integrals and compared with normal muscle ratios. In all diseases studied, beta-ATP/PCr and Pi/PCr values showed an increase from normal values. The extent of increase in beta-ATP/PCr was related to the clinical severity of the disease, suggesting that this could be a useful noninvasive means of monitoring effectiveness of therapy for neuromuscular disorders. In myotonic dystrophy and Werdnig-Hoffmann disease, GPC/PCr values increased greatly. The intracellular pH in Duchenne and postpoliomyelitis muscles was slightly elevated compared with that in normal muscles. Hydrogen-1 MR images of muscles showed fat infiltration in all patients, more in weaker muscles and less in stronger muscles.[1]


  1. Human leg neuromuscular diseases: P-31 MR spectroscopy. Bárány, M., Siegel, I.M., Venkatasubramanian, P.N., Mok, E., Wilbur, A.C. Radiology. (1989) [Pubmed]
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