Thoracic outlet syndrome involves a group of disorders that leads to compression at the thoracic outlet. The thoracic outlet is the space between the clavicle (collarbone) and first rib. Within this ...
Your pectoralis major is a large and powerful chest muscle that’s shaped like a fan. It starts from two sections: your breastbone (sternum) and your collarbone (clavicle). The two sections come ...
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