Shoulder Joint Flashcards
Anterior Deltoid
O: lateral 1/3 of clavicle
I: deltoid tuberosity
A: flexion, medial rotation
N: axillary nerve
Coracobrachialis
O: coracoid process
I: anteromedial surface of midshaft of humerus
A: flexion and adduction of arm
N: musculocutaneous nerve
Pectoralis Major (Clavicular Head)
O: medial 2/3 of clavicle
I: lateral lip of intertubercular groove of humerus
A: adduction and medial rotation and flexion of arm
N: medial and lateral pectoral nerve
Biceps Brachii (Short Head)
O: tip or coracoid process of scapula
I: radial tuberosity and bicipital aponeurosis
A: flexion and supination of forearm; flexion of arm
N: musculocutaneous nerve
Middle Deltoid
O: acromion
I: deltoid tuberosity
A: shoulder abduction
N: axillary nerve
Supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle
A: abduction of arm
N: suprascapular nerve
Posterior Deltoid
O: spine of scapula
I: deltoid tuberosity
A: extension; lateral rotation
N: axillary nerve
Teres Major
O: subscapular fossa of scapula
I: medial lip of intertubercular groove
A: adduction; medial rotation; extension of arm
N: lower subscapular nerve
Triceps Brachii (Long Head)
O: infraglenoid tubercle of scapula
I: proximal end of olecranon
A: extension of forearm; extension of shoulder
N: radial nerve
Subscapularis
O: subscapular fossa of scapula
I: lesser tubercle and crest
A: medial rotation of arm
N: upper and lower subscapular nerve
Teres Minor
O: upper 2/3 of lateral border of scapula
I: greater tubercle below infraspinatus
A: lateral rotation of arm
N: axillary nerve
Infraspinatus
O: infraspinous fossa of scapula
I: greater tubercle below supraspinatus
A: lateral rotation of arm
N: suprascapular nerve
