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Pectoral fascia
- invests pec major- is continuous inferiorly with fascia of ant abdominal wall
- deep to pectoral fascia and pectoralis major- descends from clavicle- encloses subclavius and then pec minor- becomes continuous with axillary fascia- COSTOCORACOID MEMBRANE = part of clavipectoral fascia between pec minor + subclavius, pierced by lateral pectoral nerve (supplies pec major)- SUSPENSORY LIGAMENT OF AXILLA = the part of clavipectoral fascia inferior to pec minor, supports axillary fascia and pulls it and the skin inferior to it upward during abduction of the arm forming the axillary fossa
- ensheaths scapulohumeral mm that cover the scapula + the bulk of the shoulder- invests deltoid and is continuous with pectoral fascia anteriorly and the dense infraspinous fascia posteriorly- muscles that cover the anterior + posterior surfaces of scapula are covered by deep fascia which is attached to the margins of the scapula → ossofibrous subscapular, supraspinous + infraspinous compartments
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