Upper Limb 2

Question 1

What are the parts of the brachial plexus from proximal to distal?

Answer 1

Roots, trunks, divisions, cords, and terminal branches

Question 2

What sensory nerve innervates the medial anterior part of the arm?

Answer 2

The medial brachial cutaneous nerve (medial cord).

Question 3

What sensory nerve innervates the deltoid?

Answer 3

The axillary nerve

Question 4

What sensory nerve innervates the anterior lateral part of arm?

Answer 4

The radial nerve

Question 5

What sensory nerve innervates the anterior lateral part of the fore arm?

Answer 5

The lateral antebrachial cutaneous nerve (musculocutaneous).

Question 6

What’s sensory nerve innervates the anterior medial part of the forearm?

Answer 6

The medial antebrachial cutaneous nerve (medial cord)

Question 7

What Sensory nerve innervates the medial posterior and anterior portion of the arm?

Answer 7

Medial brachial cutaneous nerve (medial cord)

Question 8

What sensory nerve innervates the medial posterior part of the form?

Answer 8

Medial antebrachial cutaneous nerve (medial cord)

Question 9

What sensory nerve innervates the middle compartment of the posterior arm and forearm?

Answer 9

The median nerve

Question 10

Where does the musculocutaneous nerve run between in the arm?

Answer 10

Between the brachialis and biceps brachii muscles

Question 11

What nerve does the median nerve branch off into you and where does this nerve go?

Answer 11

The anterior interosseous nerve. It continues through the form into the hand through the carpal tunnel

Question 12

What nerve does the radial nerve branch into in the forearm?

Answer 12

The posterior interossei is nerve

Question 13

What are the two most common injuries that axillary nerve?

Answer 13

And anterior dislocation of the humerus and a fracture of the surgical neck of the humerus

Question 14

What nerve is injured with a mid shaft fracture of the humerus?

Answer 14

Radial nerve

Question 15

What motor deficits are expected from an anterior dislocation of the glenohumeral joint or a fracture of the surgical neck of humerus? Yeah

Answer 15

Axillary nerve impacted 
Motor deficits:
Weakness of arm abduction 
Sensory deficits:
Lateral shoulder and upper arm

Question 16

What motor and sensory deficits are expected from the mid shaft fracture of the humerus?

Answer 16

Effects the radial nerve
Motor deficits:
Lost of wrist and digits extension 
Weakness of hand and forearm supination 
Sensory deficits:
Posterior arm, forearm, and dorsum of hand

Question 17

What are common injuries the median nerve?

Answer 17

Fractions of the elbow and distal humerus or with in the carpal tunnel

Question 18

What motor and sensory deficits occur from the supracondle or fracture of the humerus?

Answer 18

Effects median nerve 
Motor deficits:
Weakness of wrist flexion 
Loss of index and middle finger flexion 
Weakness of thumb abduction
Loss of thumb flexion and opposition 
Sensory deficits:
Palmar aspects of thumb
Palmar and dorsal aspects of index, middle and half of ring finger

Question 19

What are motor and sensory deficits associated with carpal tunnel syndrome?

Answer 19

Motor deficits:
Weakness of thumb abduction, flexion
Loss of thumb opposition

Sensory deficits:
Palmar aspect of thumb
Palmar and dorsal aspect of index middle and half of ring finger

Question 20

What are motor and sensory deficits associated with middle forearm fracture (anterior interosseous syndrome).

Answer 20

Effects the anterior interosseous (branch of the median nerve)
Motor deficits:
Weakness of thumb flexion
Loss of flexion of DIP joint of index and middle finger
Weakness of pronation

Sensory deficits
None

Question 21

What common injuries resulting in owner nerve lesions?

Answer 21

Fractures of medial epicondyles or compression of the nerve against the bone or with fractures or lacerations the ventral medial side of the wrist.

Question 22

What motor and sensory deficits occur from entrapment at The elbow or medial epicondyles fracture?

Answer 22

Effects ulnar nerve 
Motor deficit
-loss of finger abduction and adduction 
-loss of thumb adduction 
-loss of DIP joint flexion of the 4th and 5th digits

Sensory deficit
-medial aspect of hand and most of 4th and 5th digits

Question 23

What motor and sensory deficits results from a wrist fracture or laceration?

Answer 23

Effects ulnar nerve
Motor deficit:
-loss of finger abduction and adduction
-loss of thumb adduction

Sensory deficits:
-medial aspect of the hand and most of 4th and 5th digits

Question 24

What motor and sensory deficits occur from a proximal lesion of the arm?

Answer 24

Effects the musculocutaneous 
Motor deficits:
-weakness of forearm flexion 
-weakness of forearm and hand supination 
-weakness of arm flexion 

Sensory deficits:
-lateral forearm

Question 25

What motor and sensory deficits occur from a distal lesion of the central portion of the arm?

Answer 25

Effects musculocutaneous n.

Motor: none

Sensory: lateral forearm

Question 26

Describe lesions of the upper break you’ll plexus and lower brachial plexus.

Answer 26

The upper brachioplexus injury involves the musculocutaneous axillar and suprascapular nerve.

The lower brachioplexus injury involves the ulnar nerve

Question 27

Describe the deformity involved with a erb’s palsy or upper brachioplexus injury?

Answer 27

• The arm hangs by the side, it is adducted and medially rotated
• The farm is extended in the hand is pronated

Question 28

What loss of function is involved with an upper brachial plexus injury?

Answer 28

• Ab duction and lateral rotation of the arm
• Flexion and supination of the forearm
• Sensations lost over a small area of the lower part of the shoulder

Question 29

What nerves are commonly involved in a lower brachioplexus injury?

Answer 29

The ulnar and the median may be involved

Question 30

What deformities occur from lower brachial plexus injury?

Answer 30

• ulnar claw hand due to unopposed action of long flexors and extensors of finger (hyperextension of MP and flexion at IP joints)

Question 31

What Loss of function occurs from the lower brachioplexus injury?(klumkes palsy)

Answer 31

• Intrinsic muscles of the hand
• Ulnar flexors of wrist and fingers
• Sensations lost over a small area along the owner border of the forearm and hand

Question 32

What five branches do that axillary artery branch into?

Answer 32

Superior thoracic, thoracoacromial, posterior humeral circumflex, anterior humeral circumflex, subscapular a, lateral thoracic

Question 33

Describe the course of the median nerve from its origin in the brachial plexus to the hand.

Answer 33

The median nerve runs through the arm and close association to the brachial artery. In the upper forearm distal to the elbow the median nerve gives off the deep branch (anterior interosseous nerve) and continue into the hand through the carpal tunnel.

Question 34

Describe the course of the ulnar nerve proximal to the elbow to the hand.

Answer 34

The ulnar nerve passes posterior to the medial epicondyles of the humerus and enters the forearm. The nerve runs along the medial border of the ulna and at the wrist divides into superficial and deep branches that enter the hand.

Question 35

What bony structure does the axillary nerve run in close association to you as it travels to it’s motor and sensory destinations?

Answer 35

Posterior to the surgical neck of the humerus

Question 36

What bony structure in the arm does the radial nerve run in close association to as it travels from the posterior cord of the brachial plexus to the posterior forearm?

Answer 36

It travels in the spiral groove of the humerus through the posterior compartment of the arm before entering the forearm posterior to the lateral epicondyles of the humerus.

Question 37

What are the motor and sensory deficits that might occur with the lesion of the median nerve in the distal forearm?

Answer 37

Loss of thumb opposition, abduction, and flexion.

Sensory loss on Palmer aspect of the hand, thumb and first 2 1/2 digits

Question 38

What injury would contribute to loss of middle and index finger flexion?

Answer 38

Supraepicondylar fracture of humerus. Effects the median nerve.

Question 39

What lesion would lead to inability to make the ok sign?

Answer 39

Lesion go deep branch of median nerve (anterior interrosseous nerve). Cannot make ok sign because of lack of flexion in DIP joint of index and middle finger

Question 40

What lesion contributes to loss of DIP joint flexion of 4th and 5th digits?

Answer 40

Entrapment at the elbow or medial epicondyle fracture. This is because there is a loss of DIP joint flexion at 4th and 5th digits

Question 41

Which deficit leads to no motor deficits?

Answer 41

A distal lesion of the musculocutaneous nerve

Question 42

Which deficit leads to no sensory deficits?

Answer 42

A lesion of the deep branch of the median nerve. (Anterior interosseous)

Question 43

What arteries anastomoses between thyrocervical Trunk and subscapular arteries?

Answer 43

Suprascapular artery, transverse cervical dorsal scapular after and subscapular artery (circumflex artery)