NBCOT Occupational Therapy Certification Practice Exam

The design of an orthosis for a client with a low ulnar nerve injury is critical to address the specific functional deficits associated with this type of injury. One of the primary issues with a low ulnar nerve injury is the resulting claw hand deformity, which typically involves hyperextension of the metacarpophalangeal (MCP) joints and a lack of control over the interphalangeal (IP) joints.

Including a component that prevents hyperextension of the MCP joints while allowing for flexion is essential. This design helps to stabilize the fingers in a more functional position, preventing excessive extension at the MCP joints, which can further impair hand function and contribute to deformities. By allowing flexion at the MCP joints, the orthosis promotes a more natural hand posture that can assist with grasp and functional tasks.

In contrast, other options either do not appropriately address the specific needs of a low ulnar nerve injury or could lead to further complications in hand function. Hence, the inclusion of this particular component ensures the orthosis effectively supports the client’s recovery and functional independence.