Muscles of Arm Flashcards
Biceps Brachii
Insertion
Radial tuberosity and fascia of forearm via bicipital aponeurosis
Biceps Brachii
Origin
Short Head-tip of coracoid process of scapula
Long head-supraglenoid tubercle of scapula
Biceps Brachii
Innervation
Musculocutaenous (C5, C6)
Biceps Brachii
Actions
Supinates forearm, when supinated, elbow and shoulder joint flexor, short head resists dislocation of shoulder
Brachialis
Origin
Distal half of anterior half of humerus
Brachialis
Insertion
Coronoid process and tuberosity of ulna
Brachialis
Innervation
Musculocutaenous (C5, C6)
Brachialis
Actions
Flexes elbow joint in all positions
Coracobrachialis
Origin
Tip of coracoid process of scapula
Coracobrachialis
Insertion
Middle third of medial surface of humerus
Coracobrachialis
Innervation
Musculocutaenous Nerve
C5, C6, C7
Coracobrachialis
Actions
Helps flex and adduct shoulder joint; resists dislocation of shoulder
Triceps Brachii
Origin
Long head-infraglenoid tubercle of scapula
Lateral head-post. surface of humerus, superior to radial groove
Medial head-post. surface of humerus, inferior to radial groove
Triceps Brachii
Insertion
Proximal end of olecranon of ulna and fascia of forearm
Triceps Brachii
Innervation
Radial Groove
C6, C7,C8