Juvenile-onset myotonic dystrophy
Juvenile-onset myotonic dystrophy refers to individuals living with myotonic dystrophy type 1 (DM1) whose symptoms began during childhood or adolescence, typically before the age of 21. Adults living with DM1 whose symptoms began during childhood or adolescence are often referred to as juvenile-onset Adults or “JOAs”.
About juvenile-onset myotonic dystrophy
Juvenile-onset Myotonic Dystrophy often begins during childhood or adolescence, when academic, social, and physical demands are increasing. Because symptoms begin during key developmental years, JOAs may experience learning differences, attention or behavioral challenges, and changes in muscle function over time. Physical symptoms can be subtle at first and may become more noticeable, affecting school experiences, social development, and major life transitions.
With appropriate medical care, educational supports, and strong community connections, many JOAs are able to build meaningful routines, independence, and relationships over time.
- Often appear during childhood or adolescence
- Early signs may include subtle muscle changes, fatigue, or sleepiness
- Learning or attention differences can emerge alongside physical symptoms
- May affect school performance and require educational supports
- Can influence social interactions and behavior
- Physical stamina and muscle function may change over time
- Ongoing medical care and community support help build independence and routines
Learn more and find support
A place for Juvenile Onset Adults (JOA) and their caregivers to share challenges, offer advice, and connect with other similar members of the greater Myotonic community.
Caregiver Guide for Juvenile-Onset DM
This guide was developed as part of the comprehensive Juvenile-onset Adult support program, to help improve the quality of life of those affected by juvenile-onset DM and their caregivers.
MDF launched an away camp experience for adults ages 18+ living with juvenile onset (JOA) myotonic dystrophy! Learn more about the program.
JOA Warriors - Virtual Meeting
You are invited to a virtual meeting for the Juvenile-onset Adult Community! Re-connect with friends and make new connections in this welcoming and inclusive community on the 3rd Tuesday of every month.
JOA Caregivers - Virtual Meeting
Join MDF Support Group Facilitator, Ann Woodbury, on the 3rd Tuesday of every other month in a confidential, supportive space for parents, guardians, and caregivers to share and connect.
Subscribe to our monthly newsletter, My Dispatch: DM News for the Myotonic Dystrophy Community, for program updates.
From the digital academy on Juvenile-Onset DM
Inheritance of myotonic dystrophy type 1 (DM1)
Published: February 21, 2025
How myotonic dystrophy type 1 (DM1) is inherited
Published: February 21, 2025
Use of human pluripotent stem cells for deciphering myotonic dystrophy type 1
Published: November 29, 2023
