Fine Motor Function

The ability to make precise, coordinated movements using the small muscles of the hands and fingers. Fine motor function is essential for touch screen interaction, including tapping specific targets, typing on virtual keyboards, and performing gestures like swiping and pinching. Limited fine motor function (LFMF) can result from conditions such as essential tremor, arthritis, Charcot-Marie-Tooth disease, spinal cord injury, cerebral palsy, Parkinson's disease, or traumatic brain injury. Specific challenges include tremor (involuntary shaking), spasm (sudden involuntary contractions), stiffness, pain, poor coordination, difficulty gripping, difficulty holding still, and difficulty controlling movement direction and distance. These challenges manifest differently in touch interactions — for example, tremor increases touch variability and drift, while stiffness affects touch direction — requiring different accommodations.