Concept explainers
(a)
To label: The arrows of pronation movement of the radioulnar joints and list the agonist muscle involved in each motion. Also, find the plane in which the motion occurs and its axis of rotation.
Introduction: The movements of the upper extremity are executed by the elbow and radioulnar joints. Since these two bones share close anatomical relationship, these joints are grouped together. The elbow joint is joined with the radioulnar joint by two bones called radius and ulna that share an articulation with the humerus bone to form the elbow joint.
(b)
To label: The arrows of supination movement of the radioulnar joints and list the agonist muscle involved in each motion. Also, find the plane in which the motion occurs and its axis of rotation.
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Manual of Structural Kinesiology
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