What is characteristic of the extension synergy pattern of the arm?

The extension synergy pattern of the arm is characterized by specific movements that typically occur following neurological injuries, such as a stroke. This particular pattern features shoulder protraction, adduction, and internal rotation; this is combined with elbow extension and forearm pronation.

The shoulder protraction shows how the shoulder girdle is moved forward, which often accompanies the adduction and internal rotation of the shoulder. Elbow extension is a common finding, as it indicates that the arm is extended away from the body in a controlled manner. Pronation of the forearm further supports this pattern as it creates a stable position for the hand. Together, these movements reflect the neurological impairment that can lead to typical postures and movement strategies observed in individuals recovering from such injuries.

Understanding this pattern is crucial for practitioners as it informs rehabilitation strategies and aids in managing motor control and functional capabilities in individuals with mobility challenges.