BLOCK 1 BACK/ARM FINAL 2 Flashcards
Pectoralis major attachments
P: medial 1/2 clavicle, manubrium, sternum, costal cartilages 1-6, external obliques
D: intertubercular sulcus of humerus
Pectoralis major actions
protract, inferiorly rotate scapula
adduct, medially rotate humerus
Pectoralis major innervation
medial and lateral pectoral nerves (C5, C6)
Pectoralis major blood supply
pectoral branch of thoracoacromial artery
Pectoralis minor attachments
P: costal cartilage and ribs 3-5
D: coracoid process of scapula
Pectoralis minor actions
protract, depress, inferiorly rotate scapula
Pectoralis minor innervation
medial pectoral nerve (C8, T1)
Pectoralis minor blood supply
pectoral branch of thoracoacromial artery
Subclavius attachments
P: 1st rib and costal cartilage
D: middle 1/3 clavicle in subclavian groove
Subclavius actions
assists in stabilizing, depressing clavicle
Subclavius innervation
nerve to subclavius (C5, C6)
Subclavius blood supply
clavicular branch of thoracoacromial artery
Serratus anterior attachments
P: lateral part ribs 1-9
D: medial border of scapula
Serratus anterior actions
antagonize rhomboids
protract, depress, superiorly rotate scapula
Serratus anterior innervation
long thoracic nerve (C5, C6, C7)
Serratus anterior blood supply
lateral thoracic artery
Coracobrachialis attachments
P: coracoid process of scapula
D: middle 1/3 medial surface of humerus
Coracobrachialis actions
adducts, flexes arm
Coracobrachialis innervation
musculocutaneous nerve (C5, C6, C7)
Coracobrachialis blood supply
brachial artery
Biceps brachii attachments
P: long head @ supraglenois tubercle of scapula
short head @ coracoid process of scapula
D: radial tuberosity (bicipital aponeurosis)
Biceps brachii actions
supinates forearm, weakly flexes
Biceps brachii innervation
musculocutaneous nerve (C5, C6, C7)
Biceps brachii blood supply
brachial artery
Brachialis attachments
P: distal 1/2 anterior humerus
D: coronoid process and ulnar tuberosity
Brachialis actions
flex forearm at elbow
Brachialis innervation
musculocutaneous nerve (C5, C6, C7)
Brachialis blood supply
brachial artery
Triceps brachii attachments
P: long head @ infraglenoid tubercle of humerus
lateral head @ post. humerus sup. to radial groove, medial head @ post. humerus inf. to radial groove
D: proximal olecranon
Triceps brachii actions
chief extensor of forearm
antagonize biceps
Triceps brachii innervation
radial nerve
Anconeus attachments
P: lateral epicondyle of humerus
D: lateral olecranon, post. ulna
Anconeus actions
assist triceps in extending elbow, stabilize elbow
Anconeus innervation
radial nerve
Pronator teres attachments
P: medial epicondyle of humerus, coronoid process
D: middle lateral radius
Pronator teres action
pronate forearm, flex at elbow