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The loss of force that occurred during intermittent electrically evoked tetanic contractions was determined for the tibialis anterior muscle of normal subjects. Adult muscles showed a characteristic reduction of tension over the first two to three minutes until a steady plateau was reached. Muscles of young children showed no comparable decrease of the(More)
A protocol has been developed for the quantitative assessment of muscle function in children with muscle disease. It includes total muscle strength (% MRC) based on a clinical assessment of strength of 32 groups using the 6-point MRC grading; the force of 8 selected muscle groups measured with a specially designed electromyometer; a motor ability score(More)
BACKGROUND AND PURPOSE The EK scale comprises ten categories (EK 1-10), each contributing to an overall picture of function in the non-ambulatory stage of Duchenne muscular dystrophy (DMD). The purpose of the present study was to investigate content and construct validity of the EK scale as a tool to discriminate between levels of functional ability in(More)
The effect of chronic low frequency stimulation on the tibialis anterior muscle of children with Duchenne muscular dystrophy was investigated. Baseline data from 16 boys established low values of maximum voluntary contraction which did not improve with age. Studies of the contractile properties revealed significant slowing (p less than 0.001) of mean(More)
A 30-month prospective study of 27 Scandinavian boys with confirmed diagnosis of Duchenne muscular dystrophy was carried out to construct profiles of the natural history of the disease. Assessments which included measures of voluntary muscle strength and function were done at 3 monthly intervals except for the first and second which were separated by 1(More)
To evaluate the therapeutic possibilities of chronic electrical stimulation, muscle function studies and quantitative tests of physical assessment were used to monitor the response of quadriceps femoris to prolonged low frequency stimulation. Comparative studies of the maximum voluntary and electrically elicited responses of muscles of young ambulant(More)