Arm and cubital fossa

Question 1

What provides cutaneous sensation for the arm?

Answer 1

ventral rami of C3-T3

Question 2

What provides cutaneous sensation for the upper shoulder

Answer 2

supraclavicular n (C3-C4)

Question 3

What provides cutaneous sensation for the deltoid region

Answer 3

superior lateral brachial cutaneous n (axillary n)

Question 4

What provides cutaneous sensation for the inferior lateral arm

Answer 4

inferior lateral brachial cutaneous (radial n.)

Question 5

What provides cutaneous sensation for the posterior arm

Answer 5

posterior brachial cutaneous (radial n)

Question 6

What provides cutaneous sensation for the medial upper arm

Answer 6

medial brachial cutaneous (From medial cord)

Question 7

What provides cutaneous sensation for the lower, medial and anterior arm

Answer 7

medial antebrachial cutaneous (from medial cord)

Question 8

Why is there referred pain to the left arm during MI?

Answer 8

Intercostal brachial n. (T2-T3) shares a common origin with sensor fibers of the heart (T1-T4)

Question 9

What is the venous drainage of the arm? which one becomes axillary

Answer 9

basalic vein-medial, becomes axillary

cephalic vein-lateal

Question 10

What are the boundaries of the cubital fossa?

Answer 10

superior-line between medial and lateral epicondyles of humerus

medial-pronator teres
lateral-brachoradialis
floor-brachialis and supinator
roof-skin

Question 11

What is contained in the cubital fossa?

Answer 11

basilic vein (medial)
median n
brachial a.
cephalic vein (lateral)
cephalic and basilic are joined by median cubital (from median antecubital) 

radial n deep to brachialis

medial/lateral cutaneous antebrachial n