Hand and Upper-Limb Function in Duchenne Muscular Dystrophy

Hand and upper-limb function is the ability to use the arms, hands, and fingers for everyday tasks, and in Duchenne muscular dystrophy it becomes a central part of independence as the condition progresses. Leg weakness usually draws attention first. Over time, weakness in the shoulders, arms, and hands shapes daily life just as much, especially after a child stops walking.

This post explains how upper-limb function changes and what can help. Any individual plan belongs to the care team, including an occupational therapist.

Why the upper limbs matter

Walking gets the early focus in Duchenne, but the arms and hands do the work of daily independence. Eating, brushing teeth, using a phone or computer, driving a power wheelchair, and turning the pages of a book all depend on upper-limb function. Preserving these abilities preserves autonomy.

For many young people with Duchenne, hand and arm function is what allows school, gaming, friendships, and self-direction to continue well into the non-ambulatory years. For background on that stage, see losing ambulation in Duchenne.

How function changes over time

Duchenne weakens the muscles closest to the trunk first. In the upper body, this means the shoulders and upper arms tend to weaken before the forearms and hands. A child may first struggle to lift objects overhead or raise the arms, while still having good finger movement.

Later, reaching becomes harder, and the working space in front of the body shrinks. Fine finger movements often persist longer than large shoulder movements, which is why many people keep the ability to use a joystick, a touchscreen, or a switch even when lifting the arm is difficult.

How upper-limb function is measured

Care teams track upper-limb function with structured tools, not just impressions. The most widely used is the Performance of Upper Limb module, developed specifically for Duchenne to capture shoulder, elbow, and hand abilities across the range of the condition. (Development of the Performance of the Upper Limb module for Duchenne muscular dystrophy, PubMed)

These measures matter for two reasons. They guide individual care, and they serve as outcome measures in clinical trials, which increasingly include people who are no longer walking. For background, see functional assessments in DMD.

The role of occupational therapy

Occupational therapy is the discipline most focused on upper-limb function and daily independence. Rehabilitation, including occupational therapy, is part of the standard multidisciplinary care for Duchenne. (Birnkrant et al., DMD Care Considerations Part 1 (rehabilitation), Lancet Neurology 2018)

An occupational therapist can assess reach and grip, recommend exercises and stretches to protect range of motion, and introduce tools and techniques that keep tasks possible as strength changes. For background, see physical therapy in DMD.

Adaptations that keep tasks possible

Small changes often restore independence that weakness has taken away. Common examples include:

• Mobile arm supports and balanced forearm orthoses that reduce the effort of lifting the arm.
• Lightweight or built-up utensils, and tools positioned within easy reach.
• Touchscreens, voice control, eye-gaze systems, and switches for devices. For background, see assistive technology in DMD.
• Power wheelchair controls matched to the person’s strongest reliable movement.

The aim is to fit the task to the person, rather than asking the person to push through fatigue.

Protecting comfort and range of motion

As the arms are used less for large movements, contractures can develop at the elbows, wrists, and fingers, and the shoulders can become uncomfortable. Gentle stretching, good positioning, and attention to seating all help. Pain should always be reported, since it is treatable and not something to accept silently. For background, see pain management in DMD.

What is still uncertain

How much newer therapies will change the trajectory of upper-limb function is still being studied, and upper-limb outcome measures are an active area of research. What is clear is that attention to the arms and hands, not only the legs, protects independence across the whole course of Duchenne.

For related reading, see losing ambulation in Duchenne, functional assessments in DMD, assistive technology in DMD, physical therapy in DMD, and the reported piece When Time Is Stealing Your Child.

Disclaimer: This post is informational and does not constitute medical advice. Decisions about diagnosis or treatment must be made with a qualified care team.