Brachial Plexus

Question 1

Brachial plexus is from what vertebral levels?

Answer 1

C5-T1

Question 2

The brachial plexus carries nerve fibers from which system only?

Answer 2

sympathetic

Question 3

5 sections of brachial plexus

Answer 3

roots
trunks
divisions
cords
terminal branches

Question 4

How many roots in the brachial plexus?

Answer 4

5

Question 5

How many trunks in the brachial plexus?

Answer 5

3

Question 6

How many divisions in the brachial plexus?

Answer 6

6

Question 7

How many cords in the brachial plexus?

Answer 7

3

Question 8

How many terminal branches in the brachial plexus?

Answer 8

5

Question 9

Brachial plexus roots travel between … muscles.

Answer 9

anterior and middle scalene

Question 10

Brachial plexus cords travel under…

Answer 10

clavicle

Question 11

Brachial plexus cords wrap around …

Answer 11

axillary artery

Question 12

Brachial plexus terminal branches create an

Answer 12

axilla

Question 13

The 5 roots of the brachial plexus give out three nerves

Answer 13

dorsal scapular nerve
phrenic
long thoracic

Question 14

What prevents wings to heaven?

Answer 14

C5, 6, 7

Question 15

The superior trunk of the brachial plexus gives out two nerves

Answer 15

Suprascapular

subclavius

Question 16

3 trunks

Answer 16

superior, middle, inferior

Question 17

The suprascapular artery runs … and the nerve runs …. the superior transverse scapular ligament.

Answer 17

above

under

Question 18

3 cords of the brachial plexus

Answer 18

lateral
medial
posterior

Question 19

The cords location and names are named for their relationship to…

Answer 19

axillary artery

Question 20

Medial cord has what three branches?

Answer 20

medial pectoral nerve
medial cutaneous nerve of the arm
medial cutaneous nerve of the forearm

Question 21

Posterior cord’s three branches

Answer 21

upper subscapular nerve
thoracodorsal nerve
lower subscapular nerve

Question 22

5 terminal branches of the brachial plexus

Answer 22

musculocutaneous
axillary
median
radial
ulnar

Question 23

What can cause damage to the axillary nerve?

Answer 23

fracture of the surgical neck of the humerus

Question 24

How do you test injury to the axillary nerve?

Answer 24

by abduction of the shoulder joint beyond the first 15 degrees

Question 25

Musculocutaneous nerve innervates ...

Answer 25

coracobrachialis biceps brachialis

Question 26

Radial nerve innervates

Answer 26

all the posterior and forearm muscles

Question 27

If the humerus is fractured at the radial groove what can be damaged?

Answer 27

radial nerve and deep arm vessels

Question 28

If the humerus is fractured at the medial epicondyle what can be damaged?

Answer 28

ulnar nerve

Question 29

If there is a radial nerve injury what happens?

Answer 29

loss of elbow extension and extensor muscles of the wrist and digits are affected

Question 30

Saturday night palsy

Answer 30

radial neuropathy

Question 31

Median nerve innervates

Answer 31

all anterior compartment muscles of forearm except 1.5 muscles

Question 32

What muscles does the ulnar nerve innervate?

Answer 32

flexor carpi ulnaris and the ulnar half of flexor digitorum profundus muscles

Question 33

The ulnar nerve mainly innervates...

Answer 33

the hand

Question 34

Vertebral levels and their respective nerve roots/terminal branches: C5, C6, C7, C8, T1

Answer 34

C5, C6: axillary C5, C6, C7: musculocautaneous C8, T1: ulnar all: median and radial

Question 35

Brachial plexus injuries: Erb's palsy

Answer 35

superior part injury: C5, 6

Question 36

Brachial plexus injuries: Klumpke's palsy

Answer 36

inferior part injury: C8, T1

Question 37

Typical causes of Erb's palsy?

Answer 37

falling with shoulder on ground and shoulder dystocia

Question 38

What is shoulder dystocia?

Answer 38

delivery of baby where head is excessively pulled on and breaks away from brachial plexus because baby's head was stuck in birth canal

Question 39

Most commonly involved nerves in Erb's palsy:

Answer 39

suprascapular musculocutaneous axillary

Question 40

Muscle paralysis of Erb's palsy?

Answer 40

``` supraspinatus infraspinatus deltoid biceps brachialis brachioradialis ```

Question 41

Backpackers palsy is caused by .... and results in...

Answer 41

compression of suprascapular nerve | atrophy of supraspinatus and infraspinatus muscles