The femoral neck is the region of the femur bounded by the femoral head proximally and the greater and lesser trochanters distally (shown below). A femoral neck fracture is intracapsular, that is within the hip joint and beneath the fibrous joint capsule.
vertebral arch the dorsal bony arch of a vertebra, composed of the laminae and pedicles of a vertebra. zygomatic arch the arch formed by the temporal process of the zygomatic bone and the zygomatic process of the temporal bone. See also anatomic Table of Bones in the Appendices.
The brachial plexus is formed by the union of the anterior divisions of the lower four cervical nerves and the greater part of the anterior division of the first thoracic nerve; the fourth cervical usually gives a branch to the fifth cervical, and the first thoracic frequently receives one from the second thoracic.* 133 The anterior divisions of the upper and middle trunks unite to form a cord, which is situated on the lateral side of the second part of the axillary artery, and is called the lateral cord or fasciculus of the plexus.