Motor disabilities can range in severity depending on the level of movement that the individual maintains. While some motor disabilities are due to a traumatic event such as a brain injury or the loss of a limb, others are the result of a disease or congenital condition, including muscular dystrophy, Parkinson's disease, ALS, and cerebral palsy.
Despite the wide range of motor disabilities that might impact an individual's ability to use a computer and access the Internet, there are a few assistive technologies and devices that are frequently employed. Which device is most useful depends on the severity of the individual's disability, as well as their personal preference and what they find most helpful.
For individuals with limited movement, tools like mouth sticks or headwands may be useful. Mouthsticks tend to be inexpensive as well as being easy to use for most individuals, making them quite common.
These devices might be used in conjunction with adaptive keyboards, keyboard auto-completion software, or oversized ball mice.
If movement is even more limited, individuals may chose to use eye-tracking software to allow them to control mouse movement by following the movement of their eyes, or voice recognition software.
To make sure that content can be navigated easily by people using these devices or others, it's important to make sure that a user's movement on a website can be controlled by using a computer keyboard (either the tab key, arrows, or both).