At the elbow joiat the shapes of the aticulating surfaces the strong collateral

Question

At the elbow joiat the shapes of the aticulating surfaces the strong collateral ligaments allow flexion and extension but prevent other movements On a skeleton, examine the bony components of the elbow yont. The elbow oint shares a common joint cavity with what other joit On a model of the elbow joint, identily the two viangular shaped collatera blends and becomes continuou attached to what bone marking on the On the Isteral side the base of the lateral (radial) collateral ligament letereare humerus? On the medial side, describe t collateral ligament the artachments of the medial (ulnar) Anterior view Lateral view On a model of the elbow joint, identily the annular ligament Notice how the ligament attaches to the anterior and posterior margins of the radial notch and wraps around the radial head Speculate on the function of this ligament Radius UIna Medial view MAKING CONNECTIONS Bursae are flattened sacs lined with a synovial membrane and filled with synovial fluid. They are located at strategic locations where tendons, ligaments, muscles, or skin rub against bone or neighboring soft tissue structures (see the bottom figure on the previous page). Speculate on the function of bursae at symovial joints Word Origins The ulnar nerve passes posterior to the medial epicondyle and is close to the ulnar collateral ligament. Injury to the medial epicondyle may compress the ulnar nerve and cause temporary numbness or a tingling sensation along the nerve's area of distribution-the medial aspect of the forearm and hand. For this reason, the medial epicondyle of the humerus is called the funny bone. 91

Explanation / Answer

1. The radius and ulna and humerus, form a hinge joint. The elbow joint shares a common joint cavity with the proximal radio-ulnar joint.

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