There is also adaptation associated with use of a prosthesis or an orthosis. A Boston brace is a form of thoracolumbosacral orthosis (TLSO). It is also useful to describe the function of the orthosis. An ankle foot orthosis can be assistive or resistive. Abducens nerve palsy is also known to occur with halo orthosis placement. The shoes must also be equipped with a removable orthosis. Pain is associated with tight or shortened muscles, abnormal posture, stiff joints, unsuitable orthosis, etc. Initial treatment includes physical therapy and ankle-foot orthosis. The resultant palsy is identified through loss of lateral gaze after application of the orthosis. An assistive ankle orthosis encourages ankle movement, and a resistive ankle orthosis inhibits ankle movement. CAD/CAM software are then used to design and manufacture the orthosis, prosthesis or dental implants. The method involves wearing a compressive orthosis and adhering to an exercise protocol. A knee-ankle-foot orthosis (KAFO) is an orthosis that encumbers the knee, ankle and foot. The applied force by orthosis reduces the elongation within the musculotendinous fibers. Counterforce orthosis has a circumferential structure surrounding the arm.