<Tr> <Td> serratus anterior </Td> <Td> fleshy slips from the outer surface of upper 8 or 9 ribs </Td> <Td> costal aspect of medial margin of the scapula </Td> <Td> lateral thoracic artery (upper part), thoracodorsal artery (lower part) </Td> <Td> long thoracic nerve (from roots of brachial plexus C5, C6, C7) </Td> <Td> protract and stabilize scapula, assists in upward rotation </Td> <Td> Rhomboid major, Rhomboid minor, Trapezius </Td> </Tr> <Table> <Tr> <Th> Muscle </Th> <Th> Origin </Th> <Th> Insertion </Th> <Th> Artery </Th> <Th> Nerve </Th> <Th> Action </Th> <Th> Antagonist </Th> </Tr> <Tr> <Td> deltoid </Td> <Td> clavicle, acromion, spine of the scapula </Td> <Td> deltoid tuberosity of humerus </Td> <Td> primarily posterior circumflex humeral artery </Td> <Td> Axillary nerve </Td> <Td> shoulder abduction, flexion and extension </Td> <Td> Latissimus dorsi </Td> </Tr> <Tr> <Td> teres major </Td> <Td> posterior aspect of the inferior angle of the scapula </Td> <Td> medial lip of the intertubercular sulcus of the humerus </Td> <Td> Subscapular and circumflex scapular arteries </Td> <Td> Lower subscapular nerve (segmental levels C5 and C6) </Td> <Td> Internal rotation of the humerus </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="7"> Rotator cuff </Td> </Tr> <Tr> <Td> supraspinatus </Td> <Td> supraspinous fossa of scapula </Td> <Td> superior facet of greater tubercle of humerus </Td> <Td> suprascapular artery </Td> <Td> suprascapular nerve </Td> <Td> abduction of arm and stabilizes humerus </Td> <Td> infraspinatus, teres minor, pectoralis major, and latissimus dorsi </Td> </Tr> <Tr> <Td> infraspinatus </Td> <Td> infraspinous fossa of the scapula </Td> <Td> middle facet of greater tubercle of the humerus </Td> <Td> suprascapular and circumflex scapular arteries </Td> <Td> suprascapular nerve </Td> <Td> Lateral rotation of arm & Adduction of arm and stabilizes humerus </Td> <Td> subscapularis, pectoralis major, and latissimus dorsi </Td> </Tr> <Tr> <Td> teres minor </Td> <Td> lateral border of the scapula </Td> <Td> inferior facet of greater tubercle of the humerus </Td> <Td> posterior circumflex humeral artery and the circumflex scapular artery </Td> <Td> axillary nerve </Td> <Td> laterally rotates and adducts the arm </Td> <Td> subscapularis, pectoralis major, and latissimus dorsi </Td> </Tr> <Tr> <Td> subscapularis </Td> <Td> subscapular fossa </Td> <Td> lesser tubercle of humerus </Td> <Td> subscapular artery </Td> <Td> upper subscapular nerve, lower subscapular nerve (C5, C6) </Td> <Td> rotates medially humerus; stabilizes shoulder </Td> <Td> infraspinatus and teres minor </Td> </Tr> </Table> <Tr> <Th> Muscle </Th> <Th> Origin </Th> <Th> Insertion </Th> <Th> Artery </Th> <Th> Nerve </Th> <Th> Action </Th> <Th> Antagonist </Th> </Tr> <Tr> <Td> deltoid </Td> <Td> clavicle, acromion, spine of the scapula </Td> <Td> deltoid tuberosity of humerus </Td> <Td> primarily posterior circumflex humeral artery </Td> <Td> Axillary nerve </Td> <Td> shoulder abduction, flexion and extension </Td> <Td> Latissimus dorsi </Td> </Tr>

Part of the body that starts with k