Muscles Of Arm Flashcards
Biceps brachii insertion
Tuberosity of radius 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
Musculocutaneous nerve C5, C6
Biceps brachii actions
Supinates forearm and when it is supinator flexes elbow joint; flexes shoulder joint; short head resists dislocation of shoulder
Brachialis origin
Distal half of anterior surface of humerus
Brachialis insertion
Coronoid process and tuberosity of ulna
Brachialis innervation
Musculocutaneous nerve C5, C6
Brachialis actions
Flexes elbow joint in all position
Coracobrachialis origin
Tip of coracoid process of scapula
Coracobrachialis insertion
Middle third of medial surface of humerus
Coracobrachialis innervation
Musculocutaneous 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: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove
Triceps brachii insertion
Proximal end of olecranon of ulna and fascia of forearm
Triceps brachii innervation
Radial nerve C6, C7, C8