Abstract
We analyzed the course of motor disability in patients with Duchenne type muscular dystrophy (DMD) with respect to the duration of disability by means of motor age evalu-ating method.
Motor age was divided into nine parts from lower motor age to higher motor age. The performance rate was calculated from the performed motor tasks in each part and the course of motor disability in patients with DMD was studied with respect to the duration of disability.
The following results were obtained.
1) The performance rate which belonged to the motor tasks within lower motor age decreased gradually but the performance rate which belonged to the motor tasks within higher motor age decreased acutely or subacutely in accordance with the duration of disability.
2) The performance rate which belonged to the motor tasks within lower motor age ranged between 20% and 30% even if the duration was over 15 years.
