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U2: Shoulder Girdle

Shoulder/Pec Girdle

QuestionAnswer
Shoulder/Pectoral Girdle part of appendicular skeleton that attaches to upper limbs to trunk; each consists of clavicle and scapula
Clavicle (collarbone) sternal end articulates medially w/ sternum’s manubrium; acromial end articulates laterally w/ scapula’s acromion; acts as brace to hold shoulder in lateral position. If broken, shoulder caves medially
Scapula (shoulder blade) has acromion, spine, coracoid process, glenoid cavity/fossa
Acromion lateral projection on scapula; forms tip of shoulder, articulates with acromial end of clavicle
Spine (of scapula) ridge on posterior scapula; skeletal muscle above is supraspinatus; skeletal muscle below is infraspinatus
Coracoid process projection to which one fo the tendons of the biceps brachii attaches
Glenoid cavity/fossa very shallow socket w/ which head of humerus articulates forming essence of shoulder joint. b/c of shallowness and flexible ligaments, shoulder joint very mobile but prone to dislocation.
Created by: mbtrimm