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The left clavicle is usually longer and weaker than the right clavicle. [8] [10] The collarbones are sometimes partly or completely absent in cleidocranial dysostosis. The levator claviculae muscle, present in 2–3% of people, originates on the transverse processes of the upper cervical vertebrae and is inserted in the lateral half of the ...
Supraclavicular lymph nodes are lymph nodes found above the clavicle, that can be felt in the supraclavicular fossa. The supraclavicular lymph nodes on the left side are called Virchow's nodes. [1] It leads to an appreciable mass that can be recognized clinically, called Troisier sign. [2]
It crosses the midline to the left side at about the T5 level, continuing to ascend. It then passes posterior to the aorta, and to the left of the oesophagus. [3] Superior mediastinum. The thoracic ducts ascends into the superior mediastinum, reaching 2-3cm superior to the clavicle, [3] as high up as the C7 vertebral level. [5]
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.
The artery may ascend as high as 4 cm. above the clavicle, or any intermediate point between this and the upper border of the bone, the right subclavian usually ascending higher than the left. The left subclavian is occasionally joined at its origin with the left common carotid artery, forming a left brachiocephalic trunk.
The thoracic duct drains into the left subclavian vein, [3] near its junction with the left internal jugular vein.It carries lymph (water and solutes) from the lymphatic system, as well as chylomicrons or chyle, formed in the intestines from dietary fat and lipids, allowing these to enter the bloodstream; the products of fats and lipids can then be carried by the bloodstream to the hepatic ...
Shoulder girdle (4 bones) - Left and right clavicle (2) and scapula (2). Arms and forearms (6 bones) - Left and right humerus (2) (arm), ulna (2) and radius (2) (forearm). Hands and wrists (54 bones) - Left and right carpals (16) (wrist), metacarpals (10) ( palm ), proximal phalanges (10), intermediate phalanges (8) and distal phalanges (10 ...
The part of the clavicle near the center of the body is tilted upwards by the sternocleidomastoid muscle. Children and infants are particularly prone to it. Newborns often present clavicle fractures following a difficult delivery [citation needed]. After fracture of the clavicle, the sternocleidomastoid muscle elevates the medial fragment of ...