Chest And Upper Arm Flashcards
Pectoralis Major
Origin
Clavicular head: medial 1/2 of clavicle
Sternocostal head: anterior surface of sternum, 1st-6th costal cartilages, aponeurosis external oblique m.
Pectoralis Major
Insertion
Lateral lip intertubercular groove of humerus
Pectoralis Major
Innervation
Lateral pectoral N. (C5-C7)
Medial Pectoral N. (C8-T1)
Pectoralis Major
Action
Humerus: adduction, medial rotation
Sternal head: helps extend a flexed humerus
Clavicular head: helps flex humerus
Pectoralis Minor
Origin
3rd-5th ribs anteriorly
Pectoralis Minor
Insertion
Coracoid process
Pectoralis Minor
Innervation
Medial Pectoral N. (C8-T1)
Pectoralis Minor
Action
Scapula: protraction
Closed Chain: Elevate Ribs
Subclavius
Origin
1st Rib at costochondral junction
Subclavius
Insertion
Middle 1/3 clavicle inferior surface
Subclavius
Innervation
Nerve to Sublclavius (C5-C6)
Subclavius
Action
Clavicle: depression
Coracobrachialis
Origin
Coracoid process of scapula
Coracobrachialis
Insertion
Middle 1/3 of medial humerus
Coracobrachialis
Innervation
Musculocutaneous N. (C5-C7)
Coracobrachialis
Action
Humerus: Flexion, adduction
Biceps Brachii
Origin
Long head: Supraglenoid tubercle of scapula
Short head: Coracoid Process
Biceps Brachii
Insertion
Radial Tuberosity, Bicipital aponeurosis
Biceps Brachii
Innervation
Musculocutaneous N. (C5-C7)
Biceps Brachii
Action
Humerus: Flexion
Forearm: Flexion, Supination
Brachialis
Origin
Distal 1/2 of anterior humerus
Brachialis
Insertion
Ulnar Tuberosity
Coronoid process
Brachialis
Innervation
Musculocutaneous N. (C5-C7)
Brachialis
Action
Forearm: Flexion
Triceps Brachii
Origin
Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of lateral humerus superior to radial groove.
Medial head: posterior surface of medial humerus inferior to radial groove.
Triceps Brachii
Insertion
Olecranon process of ulna
Triceps Brachii
Innervation
Radial N. (C5-T1)
Triceps Brachii
Action
Humerus: Extension
Forearm: Extenstion
Anconeus
Origin
Lateral epicondyle of humerus
Anconeus
Insertion
Lateral surface of olecranon process
Anconeus
Innervation
Median N. (C5-T1)
Anconeus
Action
Forearm: Extension
Pronator Teres
Origin
Humeral head: medial epicondyle of humerus
Ulnar head: coronoid process of ulna
Pronator Teres
Insertion
Lateral surface of radius
Pronator Teres
Innervation
Median N. (C5-T1)
Pronator Teres
Action
Forearm: flexion, pronation
Flexor Carpi Radialis
Origin
Medial epicondyle of humerus
Flexor Carpi Radialis
Insertion
Base of 2nd metacarpal
Flexor Carpi Radialis
Innervation
Median N. (C5-T1)
Flexor Carpi Radialis
Action
Wrist: Flexion, radial deviation
Palmaris Longus
Origin
Medial Epicondyle of humerus
Palmaris Longus
Insertion
Flexor Retinaculum, palmar aponeurosis
Palmaris Longus
Innervation
Median N. (C5-T1)
Palmaris Longus
Action
Wrist: Flexion