New method for the estimation of the number of motor units in a muscle. 2. Duchenne, limb-girdle and facioscapulohumeral, and myotonic muscular dystrophies.
The results of the application of a computerized method for the estimation of motor unit numbers in the human extensor digitorum brevis are presented. In patients with Duchenne and limb-girdle and facioscapulohumeral muscular dystrophies, motor unit numbers are within the normal range, but are significantly reduced in myotonic muscular dystrophy.
D000328:Adult; D002648:Child; D003201:Computers; D004576:Electromyography / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons; D009132:Muscles / Q000294:innervation / Q000503:physiopathology*; D009136:Muscular Dystrophies / Q000145:classification / Q000175:diagnosis / Q000503:physiopathology*