What is an option for pre-positioning the elbow in flexion for a TH amputee with limited glenohumeral flexion strength?

In the context of improving functional positioning for a transhumeral (TH) amputee with limited glenohumeral flexion strength, changing from a triple control system to a dual control system offers specific advantages. A dual control system simplifies the mechanics involved in operating the prosthetic elbow and may allow for more intuitive and effective control of elbow flexion.

Advanced configurations can sometimes complicate the movement patterns needed for effective use, especially when there are limitations in strength and range of motion at the shoulder joint. By reducing the number of controls, the user may more easily manage the functional demands of flexing the elbow, as it emphasizes the most essential movements.

This approach can lead to improved performance and comfort for the user, as it tailors the device's operation to their functional ability and strength level. In contrast, more complex systems or those requiring higher strength may not provide significant benefits if the user has difficulty generating the necessary muscular effort to operate them effectively.