A patient presents with C6 quadriplegia. Which muscles will the patient use to manipulate a wrist-driven orthosis to achieve prehension?

In patients with C6 quadriplegia, the ability to perform prehension, or grasping, relies on the functionality of muscles that can be controlled at the C6 neurological level. The extensor carpi longus and brevis are primarily responsible for wrist extension, which is essential for positioning the hand in a way that allows for effective grasping and manipulation with a wrist-driven orthosis. This wrist extension is crucial because it enables the hand to open and close and assists in the release of objects, thus facilitating the process of prehension.

Additionally, wrist-driven orthosis devices often utilize the patient's existing wrist extension ability to create a functional grasp by linking the wrist movement to the hand function. The extensor carpi longus and brevis, being key in this respect, allow for this adjustment and manipulation, which is vital for activities of daily living that require grasping and holding.

Muscles like the flexor carpi radialis and ulnaris, while they assist in wrist flexion, would not be the primary ones used for controlling prehension in this context. In addition, the deltoid and biceps muscles, as well as the triceps and pectoralis major, are either not primarily involved in