Cubital fossa and forearm

Question 1

The anterior compartment muscles mostly _____ the wrist and fingers and _____ the forearm.

Answer 1

flex; pronate

Question 2

The anterior compartment muscles are innervated by what nerves?

Answer 2

ulnar or median

Question 3

The posterior compartment muscles ______ the wrist and fingers and _____ the forearm.

Answer 3

extend; supinate

Question 4

The posterior compartment muscles are innervated by the ______ nerve.

Answer 4

radial

Question 5

How many muscles are in the superficial layer? What are they?

Answer 5

3

1. Pronator teres
2. Flexor carpi radialis
3. Palmaris longus
4. Flexor carpi ulnari

Question 6

How many muscles are in the intermediate layer? What are they?

Answer 6

1

Flexor digitorum superficialis

Question 7

How many muscles are in the deep layer? What are they?

Answer 7

3

1. Flexor digitorum profundus
2. Flexor policis longus
3. Pronator quadratus

Question 8

What is a test for the ulnar nerve?

Answer 8

Stabilize all joints and just get them to flex the DIP (FDP working, ulnar is good)

Question 9

What plane does flexion and extension of the thumb occur?

Answer 9

frontal plane

Question 10

What plane does abduction and adduction of the thumb occur in ?

Answer 10

sagittal plane

Question 11

What is the radial artery covered by?

Answer 11

brachioradialis

Question 12

What muscle covers the ulnar artery?

Answer 12

flexor carpi ulnaris

Question 13

What does the common interosseous normally branch off of? What does it branch into?

Answer 13

ulnar; posterior and anterior interosseous

Question 14

What is the blood supply to the elbow from?

Answer 14

1. deep brachial a. of arm
2. ~3 recurrent radial and ulnar aa.
3. superior and inferior ulnar collateral aa.

Question 15

What is the course of the radial nerve?

Answer 15

spiral groove - lateral epicondyle - superficial and deep radial

Question 16

What does the superficial radial a. supply?

Answer 16

lateral 2/3 of skin of back of hand

Question 17

What nerve(s) innervates the web of the thumb?

Answer 17

superficial radial a.

Question 18

Is deep brachial motor, sensory or both?

Answer 18

pure motor

Question 19

What is the course of the ulnar nerve?

Answer 19

ulnar or cubital tunnel - medial epicondyle - enters through anterior compartment at junction of upper 1/3 and distal 2/3 - branches

Question 20

How many muscles does the ulnar nerve innervate?

Answer 20

1 1/2 muscles

Question 21

What are the two sensory branches of the ulnar nerve? Where do these nerves branch and what do they supply?

Answer 21

1. palmar cutaneous
2. dorsal cutaneous
   - branch in the forearm but supply the medial area of the hand

Question 22

What is the course of the median nerve?

Answer 22

2 inches below coracoid process - medial to tendon of the biceps in the cubital fossa - between two heads of the pronator teres - between FDS and FDP - anterior interosseous & palmar cutaneous

Question 23

What does the palmar cutaneous nerve from the medial nerve supply?

Answer 23

lateral 2/3 of hand

Question 24

Between what two muscles is the median nerve running between for most of its course?

Answer 24

FDS and FDP; well protected

Question 25

What are the boundaries of the cubital fossa?

Answer 25

Medial border: pronator teres
Lateral border: brachioradialis
Superior border: horizontal line between medial and lateral epicondyles of the humerus
Roof: bicipital aponeurosis
Floor: brachialis

Question 26

What is the contents of the cubital follsa, from lateral to medial?

Answer 26

1. radial nerve
2. biceps tendon
3. brachial artery
4. median nerve

Question 27

What is chronic inflammation of the common flexor tendon known as? What is the test called to check for this?

Answer 27

golfers elbow; reverse till test (passively move wrist and elbow into extension to increase tension