How to Choose the Right Wheelchair Control for Someone with Limited Arm Function

When someone has limited arm or hand function, controlling a powered wheelchair with a standard joystick may become difficult or impossible. But losing the ability to use a conventional joystick does not necessarily mean losing independent mobility.

There are many types of alternative wheelchair controls, using different movements and access points to operate a powered wheelchair. The challenge is finding the option that matches the person’s abilities, goals and everyday environment.

So, how do you choose the right wheelchair control for someone with limited arm function?

Start with the person’s abilities

The most important starting point is not the wheelchair control itself. It is the person.

Limited arm function can look very different from one individual to another. Someone may have little hand function but good head control. Another person may have useful movement in their feet, while someone else may have only a small and consistent movement in another part of the body.

A proper assessment should therefore look at the person’s remaining functional movements and how reliably they can use them. Some important questions include:

• What movements can the person perform voluntarily?
• How much strength and range of motion do they have?
• Can they make precise and repeatable movements?
• Is their motor control consistent?
• Are there involuntary movements or changes in muscle tone?
• How does their posture affect their available movements?
• Could their abilities change over time?
• What does the person need to do with their wheelchair in daily life?

These factors help determine which type of control is realistic and sustainable.

What are the alternatives to a standard joystick?

A standard joystick is usually operated with the hand and requires sufficient strength, range of motion and coordination.

When this is not possible, several alternative approaches can be considered. Depending on the individual’s abilities, these may include:

• Chin or lip controls
• Head controls
• Switch controls
• Foot controls
• Specialised or mini joysticks
• Other body-based interfaces

Alternative drive controls can range from relatively simple switches to more sophisticated proportional systems. The appropriate choice depends on the person’s motor abilities and the functions they need to control.

The goal is not to find the most technologically advanced option. It is to find the control that the person can use safely, comfortably and consistently.

When can head control be an option?

Head control can be particularly relevant for people who have insufficient arm and hand function but retain reliable head movement.

Head-controlled systems use sensors or switches positioned around the head. Specific head movements can then be translated into commands for the powered wheelchair.

However, simply having some head movement does not automatically mean that a head control is suitable. The assessment should consider:

Range of movement

Can the person move their head far enough in the required directions? Some systems require movements to the side, forwards or backwards. The available range of motion therefore needs to be considered when selecting and positioning the control.

Precision

Can the person make small, controlled movements? This becomes particularly important when driving in tight spaces or making small corrections.

Consistency

Can the movement be repeated reliably? A movement that is possible once during an assessment may not necessarily be suitable for repeated use throughout the day.

Fatigue

Can the person use the movement without excessive physical effort? A control that works well for five minutes but causes significant fatigue may not be a good long-term solution.

What if the person has useful movement in their feet?

The head is not the only possible alternative access point.

Some people with limited arm function also have controlled movement in one or both feet. In those cases, foot input may be used either as an alternative to head control or alongside it.

Combining different access points can sometimes make better use of the person’s remaining abilities. For example, someone might have reliable head movement but also have a controlled movement in one foot that could be incorporated into the driving setup.

This is why it is useful to assess all available movements, rather than deciding in advance that one particular body part will be used.

Proportional or switched control?

Another important consideration is how the wheelchair responds to the user’s input.

With switched or non-proportional control, an input generally corresponds to a predefined command. For example, activating one switch may result in forward movement at a predetermined speed.

With proportional control, the user’s input can influence the wheelchair’s movement more continuously, allowing greater variation in speed or direction.

Neither approach is automatically better for every user. Non-proportional controls can be useful for people with limited motor control because they may require simpler movements. Proportional controls can offer more nuanced control when the person has sufficient motor abilities to use them effectively.

The right choice depends on the individual’s abilities and what they need to achieve with their wheelchair.

Don’t forget posture and positioning

Wheelchair control cannot be considered separately from seating and positioning.

A person’s head, arms, feet and trunk may move differently depending on their seating position. Changes in tilt, recline or other seating functions can also affect how they interact with a control.

This is particularly important for head controls. The position of the sensors needs to correspond to the person’s natural head position and available movements.

The same applies to foot controls. The location of the sensors needs to allow the person to activate them reliably without creating unnecessary effort or an uncomfortable posture.

A good control system should work with the person’s positioning, rather than forcing the person to maintain an unnatural position.

Consider involuntary movements and changing abilities

Some people have involuntary movements, fluctuating muscle tone or movement patterns that change depending on fatigue, concentration or the environment. These factors can make the assessment more complex.

A control should therefore not only be tested under ideal conditions. It is useful to observe how the person performs when they are relaxed, tired and performing different tasks.

Future changes should also be considered. Some conditions are progressive, while children may develop new skills and movement abilities over time. A wheelchair and its control system may need to accommodate these changes.

Test the control in real-life situations

A control may work perfectly during a short clinical assessment but still be difficult to use in everyday life. Whenever possible, testing should include situations that reflect the person’s actual environment. For example:

• Driving through narrow spaces
• Turning around furniture
• Reversing
• Approaching a table or desk
• Manoeuvring around other people
• Driving outdoors
• Making small positioning adjustments

The person may also need to use other wheelchair functions while driving. These requirements should be considered as part of the overall assessment.

The goal is not simply to answer, “Can this person drive the wheelchair?” A better question is:

“Can this person control the wheelchair in the situations that matter to them?”

A practical assessment checklist

When assessing an alternative wheelchair control, it can help to consider six areas:

1. Movement. Which body movements are available and reliable?
2. Strength and range. How much force and movement are available?
3. Motor control. Can the person make precise, repeatable movements?
4. Positioning. Can the control be positioned comfortably within their natural posture?
5. Driving requirements. What movements and wheelchair functions need to be controlled independently?
6. Everyday use. Can the person use the control safely and comfortably in their real-life environment?

This creates a more complete picture than simply testing whether someone can activate a particular sensor or switch.

There is no universal solution

Choosing a wheelchair control for someone with limited arm function is ultimately an individual process.

For one person, a small adapted joystick may be sufficient. Another person may benefit from chin, switch or foot control. For someone with reliable head movement, a head-controlled system may provide an effective route to independent mobility.

The important thing is to match the technology to the person’s abilities, goals and environment.

At CoMoveIT, this principle is central to the development of alternative wheelchair controls. The company’s solutions include CoMoveIT Flex, which offers head and optional foot control, and CoMoveIT Drive, which provides head-only control. Both are designed for users who cannot rely on conventional arm- and hand-based wheelchair control.

Ultimately, the right wheelchair control is not necessarily the most complex or advanced option. It is the one that gives the individual the right combination of control, comfort, safety and independence in everyday life.