Nerve Lesions

Question 1

if suprascapular nerve is damaged, what movements are affected?

Answer 1

weak abduction and lateral rotation of the shoulder

Question 2

if thoracodorsal nerve is injured what movements are affected?

Answer 2

weakness adducting, internally rotating and extending the arm

Question 3

what three common motions will be hindered with injury to the thoracodorsal nerve?

Answer 3

climbing
rowing
pushing out of a chair

Question 4

what are three motions affected with musculocutaneous nerve damage?

Answer 4

flexion of arm
supination of arm
sensory loss of lateral aspect of arm

Question 5

what roots are involved in upper brachial plexus injury? what is another name for it?

Answer 5

C5 and C6 AKA Erbs palsy

Question 6

what roots are involved in lower brachial plexus injury? what is another name for it?

Answer 6

C8 and T1

Klumpke Palsy

Question 7

what motion occurs to lead to injury of upper brachial plexus?

Answer 7

excessive lateral stretching between head and shoulder

Question 8

how does limb change in erbs palsy?

Answer 8

adducted, internall rotated, pronated and extended at the elbow

Question 9

how does erbs palsy affect the hand? what is this known as?

Answer 9

fingers and wrist flex…called waiters tip hand

Question 10

what movement causes lower brachial plexus injuries?

Answer 10

upper limb suddenly pulled superiorly

Question 11

how does Klumpke palsy change the upper extremity?

Answer 11

thin atrophied hand and loss of sensory along C8 and T1 dermatomes

Question 12

where do you lose sensory on upper extremity with Klumpke palsy?

Answer 12

medial arm and hand

Question 13

what three changes occur with median nerve injuries?

Answer 13

weakness of anterior forearm muscles
atrophy of thenar muscles
sensory deficit in first 3.5 digits

Question 14

where does median nerve injury lead to sensory loss?

Answer 14

first 3.5 digits

Question 15

when you ask a patient to make a fist and they have median nerve injury…what happens? what is this called?

Answer 15

hand of benediction

can’t flex the thumb or 2-3 digits but can flex 4/5 digits

Question 16

radial nerve damage usually leads to what clinical phenomenon?

Answer 16

wrist drop

Question 17

what two muscle groups are hindered with radial nerve injury?

Answer 17

extensors of wrist and the supinator of the forearm

Question 18

where do you lose sensory with radial nerve damage?

Answer 18

between thumb and index finger on dorsal side of hand

Question 19

what does an ulnar nerve injury lead to in upper extremity?

Answer 19

loss of fine movements of the hand…atrophied hand

Question 20

when you ask a patient with ulnar nerve injury to make a fist, what happens? what is this called?

Answer 20

ulnar claw hand

4/5 digits cannot flex but rest can

Question 21

what other nerve injury can lead to a hand of benediction? why?

Answer 21

ulnar nerve…this is when they are opening their hand instead of making a fist as seen in median…the lumbricals are not working for the 4/5 digits so they cannot extend them well

Question 22

the posterior and anterior shoulder muscles should be considered as users of what nerve roots?

Answer 22

C5 and C6

Question 23

the posterior brachium muscles should be considered as users of what nerve roots?

Answer 23

C6 C7 C8

Question 24

the anterior brachium muscles should be considered as users of what nerve roots?

Answer 24

C5 and C6

Question 25

the posterior antebrachium muscles should be considered as users of what nerve roots?

Answer 25

C6 C7 C8

Question 26

the deep group of anterior antebrachium muscles should be considered as users of what nerve roots?

Answer 26

C7 C8 T1

Question 27

the superficial group of anterior antebrachium muscles should be considered as users of what nerve roots?

Answer 27

C6 C7 C8

Question 28

the anterior and posterior muscles of the hand should be considered as users of what nerve roots?

Answer 28

C8 and T1

Question 29

what two forearm muscles are exceptions to these rules? what are their nerve roots?

Answer 29

brachioradialis C5 C6

supinator C5 C6