triceps brachii muscle

MUSCLE	triceps brachii
Alias	triceps
ACTION	Elbow: - Extension Shoulder: - Extension (Long head) - Adduction (Long head)
Origin	Long head: - Infraglenoid tubercle of scapula - Inferior part of glenoid labrum Lateral head: - Posterior shaft of humerus lateral to the spiral groove Medial head: - Posterior shaft of humerus medial to the spiral groove
Insertion	Olecranon process of ulna Posterior capsule of elbow joint
Innervation	Radial nerve
Nerve Root	C6–C8
Artery	Deep brachial artery, posterior circumflex humeral artery (long head only)

External links

• Triceps, Wikipedia, at https://en.wikipedia.org/wiki/Triceps