Brachium

Question 0

Coracobrachialis

Answer 0

• O: coracoid process
• I: mid shaft of medial humerus
• N: musculocutaneus nerve (C5,6,7)
• V: brachial a.
• A: flex and adduct arm. Resists dislocation

Question 1

Biceps Brachii

Answer 1

• O: long head- supraglenoid tubercle / short head- coracoid process
• I: radial tuberosity and fascia of forearm
• N: musculocutaneus nerve (C5,6,7)
• V: brachial a.
• A: supinate and flex forearm

Question 2

Brachialis

Answer 2

• O: distal half of anterior humerus
• I: coronoid process and tubercle of ulna
• N: musculocutaneus n (C5,6) & radial n (C5,7)
• V: brachial a.
• A: flexes forearm

Question 3

Triceps

Answer 3

• O: long head- infraglenoid tubercle / lateral head- posterior surface of humerus, superior to radial groove / medial head- posterior surface of humerus, inferior to radial groove
• I: proximal end of olecranon & forearm fascia
• N: radial nerve (C6,7,8)
• V: profunda brachii (deep artery of arm)
• A: extend arm, resist dislocation