Brachial Plexus

Question 1

Brachial plexus is made by ____ rami of ____

Answer 1

ventral

C5-T1

Question 2

Other spinal nerves which contribute to the brachial plexus (other than C5-T1)

Answer 2

C4 and T2

Question 3

Between what muscles is the brachial plexus formed

Answer 3

Anterior and middle scalene muscles

Question 4

What are the 2 branches of the brachial plexus

Answer 4

supra-clavicular branches

infra-clavicular branches

Question 5

The supra-clavicular branches arise from…

Answer 5

roots or trunks of the plexus

Question 6

Infra-clavicular branches arise from….

Answer 6

the cords of the plexus

Question 7

____% of the normal population have brachial pelxi that are…

Answer 7

embedded in the anterior scalene

Question 8

Roots and trunks are located….

Answer 8

in the posterior neck triangle (posterior to SCM)

Question 9

Divisions of the brachial plexus are sitting …

Answer 9

immediately behind the clavicle

Question 10

Cords of the brachial plexus are found…

Answer 10

below the clavicle in the axilla

Question 11

The lateral cord is comprised of which trunks?

Answer 11

Upper and middle

Question 12

The posterior cord is comprised of which trunks?

Answer 12

Upper
Middle
lower

Question 13

The medial cord is comprised of which trunks?

Answer 13

Lower

Question 14

Which roots create the upper trunk

Answer 14

C5, C6

Question 15

Which roots create the middle trunk

Answer 15

C7

Question 16

Which roots create the lower trunk

Answer 16

C8, T1

Question 17

What nerves branch off C5 before it becomes the upper trunk

Answer 17

Nerve to scalenei
Dorsal scapular
Long thoracic

Question 18

What nerve branches occur off the upper trunk

Answer 18

Suprascapular

Nerve to subclavius

Question 19

Posterior cord branches

Answer 19

Upper subscapular 
Thoracodorsal 
Lower subscapular 
Axillary 
Radial

Question 20

Suprascapular and nerve to subclavius (which branch off the upper trunk) are motor or sensory or mixed?

Answer 20

motor

Question 21

Are the lateral and medial pectoral nerves motor, sensory, or mixed?

Answer 21

motor

Question 22

is the long thoracic nerve motor, sensory, or mixed? what does it supply?

Answer 22

motor

serratus anterior

Question 23

What does the dorsal scapular nerve supply?

Answer 23

Rhomboids and levator scap

Question 24

is the ulnar nerve motor, sensory, or mixed?

Answer 24

mixed

Question 25

What is the name for upper trunk brachial plexus injuries?

Answer 25

Erb's palsy

Question 26

What is Erb's palsy and how does it look?

Answer 26

Post the movements of the shoulder along with flexion of elbow and extension of wrist joint is lost Waiters position - med rotation of shoulder, flexion of wrist, extension of the elbow

Question 27

How does Erb's palsy or upper trunk brachial plexus injuries occur?

Answer 27

Any injury causing an sudden increase in the angle between the neck and shoulder

Question 28

What are lower trunk brachial plexus lesions called?

Answer 28

Klumkes palsy

Question 29

What is Klumkes palsy and how does it appear?

Answer 29

Involves C8-T1, usually flexor muscles of the wrist and fingers plus intrinsic mucles of the hand will be affect.

Question 30

What does Klumkes palsy or injuries to the lower trunk of the brachial plexus occur?

Answer 30

Often seen in falling accidents when the person tries to hang on to avoid falling

Question 31

When does the axillary artery begin? end?

Answer 31

Lateral broder of 1st rib | Lower border of teres major

Question 32

Where is the superior part of the axillary artery? how many branches does it have?

Answer 32

Superior to muscle | 1 branch

Question 33

Where is the Posterior part of the axillary artery? how many branches does it have?

Answer 33

Behind muscles | 2 branches

Question 34

how many branches does the inferior part of the axillary artery have?

Answer 34

3

Question 35

What is the branch of the superior part of the axillary artery?

Answer 35

Superior thoracic

Question 36

What are the branches of the posterior part of the axillary artery?

Answer 36

Thoracoacromial | Lateral thoracic

Question 37

What do the branches of the posterior part of the axillary artery supply?

Answer 37

Serratus anterior muscle

Question 38

What are the branches of the inferior part of the axillary artery?

Answer 38

Subscapular Anterior circumflex humeral Posterior circumflex humeral

Question 39

What does the axillary artery become at the lower border of the teres major

Answer 39

brachial artery