**Abstract**

Duchenne muscular dystrophy and myotonic dystrophy are genetic, progressive muscle diseases. These muscular dystrophies, which are currently incurable, cause muscle wasting or muscle weakness and decrease patients' quality of life. In addition to muscular impairments, cognitive impairments are also reported in both Duchenne muscular dystrophy and myotonic dystrophy. Cognitive impairments in each type of muscular dystrophy are different and closely related to psychosocial variables and the quality of life of the patients. We reviewed the features of cognitive functions in each type of muscular dystrophy and their correlations with the quality of life of patients. Based on the findings, we have suggested effective interventions for improving the quality of life of muscular dystrophy patients.

**Keywords:** Duchenne muscular dystrophy, myotonic dystrophy, quality of life, cognitive function
