Brachium and Cubital Fossa

Question 1

What fascia is a continuation of the fascia of the shoulder muscles and attaches to the humeral epicondyles and olecranon process?

Answer 1

brachial fascia

Question 2

What does the neurovascular compartment contain?

Answer 2

brachial a/v, median n., medial brachial and antibrachial cutaneous nn, and ulnar nerve

Question 3

Which muscle is the most powerful supinator of the hand above 90 degrees of flexion?

Answer 3

biceps brachii

Question 4

Of the primary arm flexors, which is the most powerful forearm flexor?

Answer 4

brachialis

Question 5

What nerve innervates all by one of the forearm flexors?

Answer 5

musculocutaneous

Question 6

What nerve innervates the brachioradialis?

Answer 6

radial nerve

Question 7

Which muscle has the best mechanical advantage for flexion of the forearm during a handshake?

Answer 7

brachiradialis

Question 8

What are the primary flexors of the forearm?

Answer 8

biceps brachii, brachialis, bracioradialis (is not technically in the anterior compartment but function is the same)

Question 9

What artery supplies the arm?

Answer 9

brachial artery

Question 10

Where does the brachial artery divide into the radial and ulnar arteries?

Answer 10

cubital fossa

Question 11

What branch of the brachial artery accompanies the radial nerve along the radial groove of the humerus?

Answer 11

profunda (deep) brachial a

Question 12

what brachial artery branch arises form the medial aspect of the mid-portion and course with the ulnar nerve to

Answer 12

superior ulnar collateral a.

Question 13

what 3 arterial branches arise from the brachial a.?

Answer 13

profunda (deep) brachial, superior ulnar collateral, inferior ulnar collateral

Question 14

what are the two main nerves that provide innervations to the brachium?

Answer 14

musculocutaneous and radial nerves

Question 15

What nerve courses through the cubital fossa deep to the bicipital aponeurosis where it passes into the forearm between the two heads of the pronator teres muscle?

Answer 15

median (C6, 7, 8, T1)

Question 16

What nerve exits the neurovascular compartment with superior ulnar collateral artery midway in brachium by piercing the posterior lamina of the medial intermuscular septum to course inferiorly along the posterior lamina of the medial intermuscular septum?

Answer 16

ulnar n. (C8, T1)

Question 17

What nerve pierces the coracobrachialis muscle and continues by running inferiorly between the biceps and brachialis muscles.

Answer 17

musculocutaneous n. (C5, 6, 7)

Question 18

What nerve passes laterally to course between the lateral and medial heads of the triceps to posterior surface of humerus and runs in the radial groove with the deep brachial artery?

Answer 18

radial n. (C5-T1)

Question 19

What are the boundaries of the cubital fossa?

Answer 19

lateral- brachioradialis muscle
medial - pronator teres muscle
superior - a line drawn through both humeral epicondyles
roof - deep fascia
floor - brachialis and supinator muscles

Question 20

What is contained in the cubital fossa?

Answer 20

(lateral to medial) tendon of biceps, brachial artery, medial nerve

Question 21

What superficial structures are associated with the cubital fossa?

Answer 21

median cubital vein, lateral antebrachial cutaneous n

Question 22

What deep structure is associated with the cubital fossa?

Answer 22

bifurcation of the radial nerve into its superficial and deep branches.