Neuro-vascular Structures of Anterior Foreram

Question 1

Where does the brachial artery begin

Answer 1

Lower border of teres major and ends in the cubital fossa close to the neck of the radius into radial and ulna arteries

Question 2

Anterior and Posterior Circumflex Humeral Arteries

Answer 2

At the level of the humeral surgical neck these arise off the axillary artery. They circle posteriorly around the humerus to supply the shoulder region.

Question 3

Subscapular Artery

Answer 3

Arises at the neck of the surgical humerus

Question 4

Profunda Brachii

Answer 4

Immediately distal to the teres major muscle, the brachial artery gives rise to this. It is the deep artery of the arm. It travels along the posterior surface of the humerus in the radial groove. It supplies structures in the posterior aspect of the arm (triceps brachii)

Question 5

Brachial Artery

Answer 5

Descends down the arm immediately posterior to the median nerve. As it crosses the cubital fossa, underneath the brachialis muscle, the brachial artery terminates

Question 6

Nerve roots of the median nerve

Answer 6

C6-T1

Question 7

Motor functions of the median nerve

Answer 7

Innervates the flexor muscles in the anterior compartment of the forearm (except the flexor carpi ulnaris and part of flexor digitorum profundus). also supplies innervation to the thenar muscles and lateral two lumbricals

Question 8

Sensory function of the medial nerve

Answer 8

Gives rise to the palmar cutaneous branch, which innervates the lateral part of the palm, and the digital cutaneous branch, which innervates the lateral three and a half fingers on the palmar surface of the hand.

Question 9

Chord deriving the Median nerve

Answer 9

Medial and lateral chords.

Question 10

Anatomical Course of the Median Nerve

Answer 10

It descends along the lateral side of the axillary artery and upper part of the brachial artery. In the middle of the arm it crosses to the medial side of the brachial artery and enters the cubital fossa.

Question 11

Median Nerve in the Forearm

Answer 11

Travels between the flexor digitorum profundus and flexor digitorum superficialis muscles.

Question 12

Anterior interosseous nerve

Answer 12

Supplies the deep muscles in the anterior forearm (branch of median nerve)

Question 13

Palmar cutaneous nerve

Answer 13

Innervates the skin of the lateral palm

Question 14

Spinal roots of the ulnar nerve

Answer 14

C8-T1

Question 15

Motor functions of the ulnar nerve

Answer 15

Innervates the muscles of the hand (apart from the thenar muscles and two lateral lumbricals), flexor carpi ulnaris and medial half of flexor digitorum profundus

Question 16

Sensory functions of the ulnar nerve

Answer 16

Innervates the anterior and posterior surfaces of the medial one and half fingers, and the associated palm area

Question 17

Ulnar nerve cord

Answer 17

Medial

Question 18

Ulnar nerve in the arm

Answer 18

After arising from the brachial plexus, the ulnar nerve descends down the medial side of the upper arm. At the elbow, it passes posterior to the medial epicondyle of the humerus, entering the forearm. At the medial epicondyle, the nerve is easily palpable and vulnerable to injury