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• we test supraspinatus by having pt resist abduction (0-20 degrees) (muscle should be tense)
• infraspinatus origin: spine
• supraspinatus' main function is abduction
• infraspinatus' main function is to externally rotate
• we test infraspinatus by having pt resist external rotation (elbow at side, push hard against hand)(muscle should be tense)
• teres minor's main function is to externally rotate
• bicep (long head) origin: supraglenoid tubercle (vertical to the bicipital groove)
• bicep (short head) origin: coracoid process
• we test bicep (long head) by having pt resist shoulder flexion (hold up simba, push down on end w/1 finger)(muscle should hurt when pushed on)
• the main function of the bicep (long head) is to abduct the arm (shoulder flexion)
• the main functions of the pec major are internal rotation, shoulder flexion, and shoulder extension
• latissimus dorsi origin: iliac crest and sacrum
• latissimus dorsi insertion: bicipital groove
• latissimus dorsi action: internal rotation
• deltoids (anterior) origin: lateral 3rd of clavicle
• deltoids (middle) insertion: acromion process
• deltoids (posterior) origin: spine of scap
• deltoids (anterior & posterior) insertion: deltoid tuberosity
• deltoids (middle) origin: deltoid tuberosity
• we test the deltoids by having pt resist abduction (anterior), flexion (anterior), and extension (posterior, have pt push backwards)
• deltoids insertion: deltoid tuberosity (a & p), acromion process (middle)
• deltoids origin: spine of scap (p), lateral 3rd or clavicle (a), and deltoid tuberosity (middle)