Abstract
This article describes mechanical stress and functional kinetics in the upper limbs as biomechanics related to bone and joint disorders in the upper extremity. Mechanical stresses to the human body are classified as traction, compression and shearing. The therapist has to identify the location, timing and reason for mechanical stress. For the functional kinetics of the upper limbs, a typical kinetic chain, the setting phase in shoulder flexion, anterior displacement of the humeral head, winging scapula, elbow valgus, motion axis of forearm, and grasping, are presented. For management of musculoskeletal disorders, it is important to understand the mechanical stress on the human body and the functional kinetics of body being subjected to mechanical stress.
