Motor Function Measure Scale (MFM): New Instrument for Follow-Up Brazilian Patients with Neuromuscular Disease

Myotonic Dystrophy (MD) is defined as the most common inherited myopathy in adults, with multisystemic involvement (cardiovascular, respiratory, nervous, visual, endocrine), autossomal dominant pattern and distinct clinical manifestations (2,5,6). Depending on the genetic trait, MD is classified as type 1 (MD-1), type 2 (MD-2) (7), or type 3 (8); being the type 1 the most common and the type 3, very rare.