FSC316H5 Lecture 4: FSC316 LEC4 300119
Document Summary
Thorax: position & planes, breast and pectorals, compartments thoracic cage. Orientation of the thorax superior: superior thoracic inlet lateral, midaxillary line (armpits) inferior inferior thoracic outlet/aperture irregular shape following diaphragm, diaphragm. Posterior thoracic cage: back muscles are not part of thoracic proper anterior thoracic cage and breast. 3 holes in diaphragms for inferior vena cava aorta and esophagus to pass through. Origin: humerus head insert along sternum lateral r1 along inferior mid-medial clavicle lateral manubrium to lateral sternal-xyphoid joint. Originates: ribs and inserts at coracoid process of scapula, r3-5 at costal cartilages. Insertion: medial & superior surfaces of scapula at coracoid process. Blood supply: branches of branchial artery. Innervation: medial pectoral nerves (cervical & spinal nerve branches) function, depresses shoulder, draws ribs up and out during deep inhalation. Distinguish trauma v pathology v pseudo-trauma: surface pattern e. g. seatbelt sign the long bruise as seen is known as a seatbelt sign, medical history, social history.
