Duchenne muscular dystrophy (DMD) is a genetic disorder characterized by progressive muscle degeneration and weakness due to the alterations of a protein called dystrophin that helps keep muscle cells intact TIMELINE: 0:04 Introduction 0:11 Symptoms 0:50 Physical examination 1:26 Duchenne muscular dystrophy 1:44 Suses /.etiology 2:01 Diagnosis 2:34 DMD progression 3:24 Treatment 5:48 End