MICROANATOMY

Detailed explanation-1: -Insertion: Posterior surface of the olecranon process of the ulna, capsule of the elbow joint and antebrachial fascia.

Detailed explanation-2: -The triceps brachii muscle and its insertion on the olecranon.

Detailed explanation-3: -The olecranon is the region of the proximal ulna that extends from the tip of the ulna to the coronoid process distally and is the insertion site of the triceps. Olecranon fractures typically occur as a result of a fall or direct trauma to the elbow.

Detailed explanation-4: -The triceps brachii happens to have four points of attachment: one insertion on the ulna and three origins (two on the humerus and one on the scapula).

Detailed explanation-5: -While both its origin tendons are covered by the deltoid, its insertion tendon can be easily seen and palpated at the crook of the arm. The space between the biceps and triceps forms two grooves (medial and lateral bicipital grooves).