Muscles of the Posterior Arm Muscle Table

Question 1

Triceps Brachii long head origin

Answer 1

infraglenoid tubercle

Question 2

Triceps Brachii lateral head origin

Answer 2

posterior humerus lateral, and superior to radial groove

Question 3

Triceps Brachii medial head origin

Answer 3

posterior humerus medial and inferior to the radial groove

Question 4

Insertion for ALL heads of Triceps brachii

Answer 4

olecrannon of the ulna

Question 5

Innervation for ALL heads of Triceps brachii

Answer 5

Radial N.

Question 6

Action for ALL heads of Triceps brachii

Answer 6

extension at the elbow joint

Question 7

Additional action of triceps long head

Answer 7

extension at the shoulder joint