The Myotonic Dystrophy Foundation is excited to introduce Understanding Myotonic Dystrophy, a new series of short educational animations designed to educate people living with myotonic dystrophy (DM) and their healthcare providers!

Our second animation “Understanding Myotonic Dystrophy – Inheritance of Myotonic Dystrophy Type 1 (DM1)”, explains how DM1 is passed down from generation to generation and highlights the importance of genetic testing. This animation is a valuable resource for individuals and families living with DM1, helping them deepen their understanding of DM, raise awareness within their families, and educate others about myotonic dystrophy.

Stay tuned—our next video on Myotonic Dystrophy Type 2 (DM2) is coming soon!

We are sincerely thankful to all physicians, care providers, and patients for their help providing suggestions, opinions, and input regarding content and design throughout this process. Please let us know what topics you would like us to cover in a future animation. Click here to share your feedback! 

Read the Transcript - Understanding Myotonic Dystrophy: Inheritance of Myotonic Dystrophy Type 1 (DM1)

Dr. Smith: "I have Emma's genetic test results . She has myotonic dystrophy type 1. It is caused by an expanded repeat in a gene. This leads to Emma's symptoms."

Sarah: "How did she get it?"

Dr. Smith: "It is inherited. If one parent has it, there's a 50% chance of passing it to their children with each pregnancy."

Sarah: "Did I give it to Emma or did John?"

Dr. Smith: "Emma could have inherited myotonic dystrophy from either of you. Sarah, You mentioned your father had early cataracts and muscle weakness; both could have been symptoms of myotonic dystrophy."

Sarah: "How can we find out?"

Dr. Smith: " You and John should get tested. You may have inherited the expanded gene from your dad and passed it on to Emma. Or John, may have inherited it from his mother or father and passed it on to Emma."

Sarah: "If we don't have any symptoms, why is Emma sick?"

Dr. Smith: "Symptoms can manifest later in life and may worsen from one generation to the next. Doctors call this anticipation. Testing will provide clarity and this will help us understand the risk for your family and future children."