What is the tenodesis effect?

The tenodesis effect refers to the passive movement of the fingers resulting from a change in wrist position, particularly where the action in the wrist impacts the movement of the fingers due to the anatomy and biomechanics around the wrist and finger tendons. When the wrist is actively extended, the fingers flex passively due to the tension on the flexor tendons. This relationship is particularly relevant in individuals with wrist drop or in certain rehabilitation approaches where maximizing functional use of the hand is essential.

In this context, the correct response accurately describes the tenodesis effect as it emphasizes that active wrist extension leads to the passive flexion of the fingers. This principle is often utilized in prosthetic design and rehabilitation strategies for individuals with upper limb deficiencies, allowing them to effectively grasp or manipulate objects through wrist movements. Understanding this effect is crucial for both practitioners and patients in achieving better functionality and independence in daily activities.