What additional component accompanies an opponens orthosis for treating an ulnar nerve lesion at the wrist?

When treating an ulnar nerve lesion at the wrist, the inclusion of a metacarpophalangeal (MP) stop is essential for effective management and rehabilitation. The ulnar nerve primarily affects the intrinsic muscles of the hand responsible for fine motor control and grip strength, particularly those that control the movement of the fingers.

An opponens orthosis is designed to support and position the hand while allowing the thumb to function effectively, which is vital in maintaining the dexterity and grasp necessary for daily activities. Incorporating an MP stop helps to limit the motion of the proximal interphalangeal (PIP) joint, preventing hyperextension or excessive flexion that could compromise the healing process or worsen the symptoms associated with the ulnar nerve lesion.

This stabilization aids in protecting the ulnar nerve functioning by maintaining optimal hand positioning, enabling the patient to regain or maintain functional use of the hand while minimizing the risk of further injury or exacerbation of symptoms related to the nerve. Overall, the MP stop supports the therapeutic goals aligned with the treatment of ulnar nerve lesions, making it a necessary component of the orthosis.