Surgical neck of the humerus Surgical neck of the humerus The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle, and above the Deltoid Tuberosity. It is much more frequently fractured than the anatomical neck of the humerus. A fracture in this area is most likely to cause damage to the axillary nerve and posterior circumflex humeral artery. Damage to the axillary nerve affects function of the teres minor and deltoid muscles, resulting in loss of abduction of arm (from 15-90 degrees), weak flexion, extension, and rotation of shoulder as well as loss of sensation of
Supracondylar process of the humerus incidental finding on radiographs made for other reasons, but occasionally isolated fractures of the process itself may lead to its discovery. Rarely, presence of the process and a connecting ligament may lead to compression of the brachial artery and the median nerve, leading to pain, paresthesia and/or ischemia. The supracondylar process is a vestigial remnant of the supracondylar foramen or epitrochlear foramen found in other vertebrates including cats, climbing mammals and lower primates. Supracondylar process of the humerus The supracondylar process of the humerus (also known as an "avian spur") is a bony projection on the anteromedial aspect of the