Functional Organization of the Arm and Forearm

Question 1

The anterior or flexor compartment contains muscles that flex the elbow joint, and _______the proximal radial ulnar joint

1. Supinate
2. Pronate

Answer 1

Supinate. The posterior or extensor compartment contains muscles that extend the joint.

Question 2

In the forearm, the flexor compartment contains muscles that flex the wrist joint, _____the radioulnar joints, and flex the digits

1. Supinate
2. Pronate

Answer 2

Pronate. The posterior or extensor compartment contains musles that extend the wrist joint, supinate the radioulnar joint and extend and abduct the digits

Question 3

______ connect one region to another and provide a passageway for the contents of one area to enter a different area.

1. Anastomosis
2. Transition zone

Answer 3

Transition Zone

Question 4

_____is the strongest flexor of the elbow joint?

1. Brachialis
2. Biceps Brachii
3. Triceps

Answer 4

Biceps Brachii. the biceps insert into the radius

Question 5

When the forearm is prone, what muscles acts as the main flexor for the elbow joint?

1. Brachialis
2. Biceps Brachii
3. Triceps

Answer 5

Brachialis. Reverse curl exercises strengthen this muscle

Question 6

Which does not act on the elbow but is involved with flexing and adducting the shoulder joint?

1. Coracobrachialis
2. Brachialis
3. Biceps Brachii
4. Triceps

Answer 6

Coracobrachialis

Question 7

Musculocutaneous Nerve supplies motor innervation to muscles in the _______brachial compartment

1. Anterior
2. Posterior

Answer 7

anterior. It also carries sensory information from the lateral portion of the forearm, part of the C6 dermatome.

Question 8

Blood supply to the muscles in the anterior compartment comes from which artery?

1. Subclavian artery
2. Radial Artery
3. Brachial artery
4. Ulnar artery

Answer 8

Brachial artery. Its muscle branches go to the anterior compartment of the arm, its collateral branches participate in the elbow anastomosis, and the it forms into the deep brachial artery that supplies the extensor compartment.

Question 9

Which muscles is not located in the posterior compartment which is involved with extending the elbow?

1. Triceps Brachii
2. Brachialis
3. Anconeous

Answer 9

Brachialis. The posterior compartment is innervated by the radial nerve.

Question 10

Which artery gives off muscuar branches to the muscles in the extensor compartment and collateral branches that participate in elbow anastomosis?

1. Brachial Artery
2. Deep Brachial Artery

Answer 10

Deep Brachial Artery

Question 11

Which region is venapuncture usually performed?

Answer 11

Cubital Fossa

Question 12

The boundaries of the imaginary line connecting the epicondyles, the pronator teres, and the brachioradialis form the _______

Answer 12

Cubital fossa. The roof consists of skin, fascia, and the bicipital goorve. The floor is the brachialis and the supinator. It contents include the radial nerve, the biceps tendon, and the brachial artery and vein (terminal branches are the radial and ulnar artery, and the median nerve.

Question 13

The cephalic vein drains the skin on the _____side of the forearm

1. medial
2. lateral

Answer 13

lateral, it also drains into the axillary vein near the apex of the axilla.

Question 14

The median cubital vein is an unusual site for_______.

Answer 14

Venapuncture.

Question 15

______ acts of the distal radioulnar joint

1. Pronator Teres
2. Pronator quadratus

Answer 15

Pronator quadratus