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In birds, where the arm is somewhat rotated compared to other tetrapods, it is termed dorsal epicondyle of the humerus. In comparative anatomy, the term ectepicondyle is sometimes used. [2] A common injury associated with the lateral epicondyle of the humerus is lateral epicondylitis also known as tennis elbow. Repetitive overuse of the forearm ...
Epicondyles are on the medial and lateral aspects of the elbow, consisting of the two bony prominences at the distal end of the humerus. These bony projections serve as the attachment point for the forearm musculature. [2] Inflammation to the tendons and muscles at these attachment points can lead to medial and/or lateral epicondylitis.
impacted posterior humeral head fracture occurring during anterior shoulder dislocation: Hill Sachs Lesion at Wheeless' Textbook of Orthopaedics online Holstein–Lewis fracture: Arthur Holstein Gwylim Lewis: fracture of the distal third of the humerus resulting in entrapment of the radial nerve: Holstein-Lewis fracture at Orthopedic Weblinks
A humerus fracture is a break of the humerus bone in the upper arm. [1] Symptoms may include pain, swelling, and bruising. [1] There may be a decreased ability to move the arm and the person may present holding their elbow. [2] Complications may include injury to an artery or nerve, and compartment syndrome. [2]
The lateral supracondylar ridge is a prominent, rough margin on the lower part of the lateral border of the humerus. It presents an anterior lip for the origin of forearm extensors, including the brachioradialis muscle above, and the extensor carpi radialis longus muscle below. [ 1 ]
The mechanism of injury is most commonly due to fall on an outstretch hand. [3] Extension type of injury (70% of all elbow fractures) is more common than the flexion type of injury (1% to 11% of all elbow injuries). [4] Injury often occurs on the non-dominant part of the limb. Flexion type of injury is more commonly found in older children.
An injury resulting in an outward (valgus) stress on the elbow, such as falling on an outstretched hand causes an avulsion fracture of the medial epicondyle. [citation needed] The medial epicondyle is often the final growth plate (ossification center) to ossify in the elbow. Growth plates are particularly vulnerable to injury compared to bone.
The trochlea has the capitulum located on its lateral side and the medial epicondyle on its medial. It is directly inferior to the coronoid fossa anteriorly and to the olecranon fossa posteriorly. In humans, these two fossae, the most prominent in the humerus, are occasionally transformed into a hole, the supratrochlear foramen , [ 2 ] which is ...