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The clavicle, collarbone, or keybone is a slender, S-shaped long bone approximately 6 inches (15 cm) long [1] that serves as a strut between the shoulder blade and the sternum (breastbone). There are two clavicles, one on each side of the body. The clavicle is the only long bone in the body that lies horizontally. [2]
Different types of bone markings and features. A condyle is the round prominence at the end of a bone, most often part of a joint – an articulation with another bone. [2] The epicondyle refers to a projection near a condyle, particularly the medial epicondyle of the humerus. [3] These terms derive from Greek. [4] [a]
Mid-clavicular line: A vertical line passing through the midpoint of the clavicle. Mammillary line; Anterior axillary line: A vertical line on the anterior torso marked by the anterior axillary fold. Midaxillary line: A vertical line passing through the apex of the axilla.
Its height also varies according to the position of the arm, being diminished by raising the limb, on account of the ascent of the clavicle, and increased by drawing the arm downward, when that bone is depressed. This space is covered by the integument, the superficial and deep fasciæ and the platysma, and crossed by the supraclavicular nerves.
Illustration showing fracture of clavicle. The clavicle is the bone that connects the trunk of the body to the arm, and it is located directly above the first rib. A clavicle is located on each side of the front, upper part of the chest. The clavicle consists of a medial end, a shaft, and a lateral end.
The triangles of the neck describe the divisions created by the major muscles in the region.. The side of the neck presents a somewhat quadrilateral outline, limited, above, by the lower border of the body of the mandible, and an imaginary line extending from the angle of the mandible to the mastoid process; below, by the upper border of the clavicle; in front, by the middle line of the neck ...
The clavicle represents the first remains of the extinct species Australopithecus sediba, found in South Africa and believed to be an early Homo relative. The thumb bone was found at Rising Star ...
The acromioclavicular ligament, which attaches the clavicle to the acromion of the scapula. Superior acromioclavicular ligament. This ligament is a quadrilateral band, covering the superior part of the articulation, and extending between the upper part of the lateral end of the clavicle and the adjoining part of the upper surface of the acromion.