Orthosis
Pronunciation: or-THOH-sis
An externally applied device designed to modify the structural or functional characteristics of the neuromuscular and skeletal systems.
Full Definition
An orthosis is an externally applied device used to support, align, prevent, or correct deformities or to improve the function of movable body parts. Unlike a prosthesis, it is applied to an existing body segment rather than replacing a missing one. Orthotists prescribe and fit orthoses following clinical assessment of a patient's biomechanical needs. The term is preferred in clinical and editorial contexts over the colloquial 'brace' or 'splint' when precision is required. The plural form is 'orthoses', not 'orthosises'.
Usage
Usage note: Do not use 'orthosis' and 'orthotic' interchangeably; 'orthotic' is an adjective or refers to the insole/insert, not the full device.
In Context
- "The clinical report specified that the patient had been fitted with a custom ankle–foot orthosis following nerve damage." — Clinical assessment report
- "Editors should ensure 'orthoses' is used as the plural, not 'orthosises'." — Editorial style guide