Glossary

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Oral Motor Impairment(also: Oral-Motor Dysfunction, Oromotor Impairment)

A condition affecting the muscles and movements of the mouth, jaw, lips, and tongue that are involved in speech production, feeding, and swallowing. Oral motor impairments can result from neurological conditions such as cerebral palsy, stroke, or traumatic brain injury, and may…

Orthotics(also: Orthosis, Orthoses, Orthotic Device)

Externally applied devices used to modify the structural and functional characteristics of the neuromuscular and skeletal systems — including braces, splints, and supports for the spine, limbs, hands, feet, and neck. Orthoses stabilize joints, correct alignment, redistribute…

Osteoarthritis(also: OA, Degenerative Joint Disease)

The most common form of arthritis, caused by progressive breakdown of the cartilage that cushions the ends of bones. Osteoarthritis produces joint pain, stiffness, swelling, and reduced range of motion, most often in the hands, knees, hips, and spine. For digital accessibility,…

Overlap Error(also: Key Overlap Error, Simultaneous Key Press Error)

A typing error that occurs when two keys are pressed down at the same time, typically when a finger accidentally activates an adjacent key while moving toward the intended key, or when a user's hand rests on a key unintentionally. Overlap errors are particularly common among…

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