Muscles of the Posterior Compartment of Arm

Question 1

Triceps Brachii Long Head
(Origin)

Answer 1

Origin: Infraglenoid Tubercle of Scapula

Question 2

Triceps Brachii Long Head
(Insertion)

Answer 2

Insertion: Proximal End of Olecranon

Question 3

Triceps Brachii Long Head
(Action)

Answer 3

Action: Extension of Forearm; Extension of Shoulder

Question 4

Triceps Brachii Long Head
(Innervation)

Answer 4

Innervation: Radial Nerve

Question 5

Triceps Brachii Long Head
(Blood Supply)

Answer 5

Blood Supply: Brachial Artery (Profunda)

Question 6

Triceps Brachii Lateral Head
(Origin)

Answer 6

Origin: Posterior Surface of Humerus above and lateral to groove of radial nerve

Question 7

Triceps Brachii Lateral Head
(Insertion)

Answer 7

Insertion: Proximal End of Olecranon

Question 8

Triceps Brachii Lateral Head
(Action)

Answer 8

Action: Extension of Forearm

Question 9

Triceps Brachii Lateral Head
(Innervation)

Answer 9

Innervation: Radial Nerve

Question 10

Triceps Brachii Lateral Head
(Blood Supply)

Answer 10

Blood Supply: Brachial Artery (profunda)

Question 11

Triceps Brachii Medial Head
(Origin)

Answer 11

Origin: Posterior Surface of Humerus below and medial to groove of radial nerve

Question 12

Triceps Brachii Medial Head
(Insertion)

Answer 12

Insertion: Proximal End of Olecranon

Question 13

Triceps Brachii Medial Head
(Action)

Answer 13

Action: Extension of forearm

Question 14

Triceps Brachii Medial Head
(Innervation)

Answer 14

Innervation: Radial Nerve

Question 15

Triceps Brachii Medial Head
(Blood Supply)

Answer 15

Blood Supply: Brachial Artery (profunda)

Question 16

Anconeus
(Origin)

Answer 16

Origin: Lateral Epicondyle of the Humerus

Question 17

Anconeus
(Insertion)

Answer 17

Insertion: Lateral Side of Olecranon of Ulna

Question 18

Anconeus
(Action)

Answer 18

Action: Extension of Forearm; stabilize elbow joint against flexion or pronation-supination

Question 19

Anconeus
(Innervation)

Answer 19

Innervation: Radial Nerve

Question 20

Anconeus
(Blood Supply)

Answer 20

Blood Supply: Brachial Artery