Brachial Plexus

Question 1

The brachial plexus is a collection of

Answer 1

nerves and consists of roots, trunks, divisions, and cords

Question 2

Roots are formed from

Answer 2

Primary rami of the 5,6,7,8 cervical and 1st thoracic nerves

Question 3

Upper trunk is formed from
Middle trunk is formed from
Lower trunk is formed from

Answer 3

5&6th cervical roots
7th cervical root
8th cervical & 1st thoracic root

Question 4

The 3 trunks lie

Answer 4

above the clavicle in the neck

Question 5

Divisions

Answer 5

Each trunk divides behind the clavicle into anterior and posterior divisions

Question 6

Cords

Answer 6

Medial Cord- formed by anterior division of lower trunk
Lateral Cord- formed by anterior division of middle & upper trunks
Posterior Cord- formed by fusion of posterior divisions of 3 trunks

Question 7

All branches of the lateral and medial cords supply the

Answer 7

flexor side

Question 8

All branches of the posterior cord supply the

Answer 8

extensor side

Question 9

Roots and trunk lie

Answer 9

in the neck

Question 10

Divisions lie

Answer 10

in apex of axilla behind clavicle

Question 11

Cords and its branches lie

Answer 11

in the axilla

Question 12

Nerve to rhomboids is also called

Answer 12

dorsal scapular nerve

Question 13

nerve to rhomboids arises from

Answer 13

root of C5

Question 14

nerve to rhomboids supplies the

Answer 14

scapula
levator scapulae
rhomboid muscle

Question 15

nerve to serratus anterior is also called

Answer 15

long thoracic nerve

Question 16

nerve to serratus anterior arises from

Answer 16

roots of C5,6,7

Question 17

nerve to serratus anterior supplies the

Answer 17

serratus anterior muscle

Question 18

nerve to subclavius arises from

Answer 18

upper trunk

Question 19

suprascapular nerve arises from

Answer 19

upper trunk

Question 20

suprascapular nerve supplies the

Answer 20

supraspinatus muscle, infraspinatus muscle, acromioclavicular and shoulder joints

Question 21

branches of lateral cord

Answer 21

1. musculocutaneous nerve
2. lateral root of median nerve
3. lateral pectoral nerve

Question 22

lateral pectoral nerve supplies the _____ by piercing the ____

Answer 22

pectoralis major

pierces the clavi pectoral fascia

Question 23

branches of the medial cord

Answer 23

1. ulnar nerve
2. medial root of median nerve
3. medial pectoral nerve
4. medial cutaneous nerve of arm
5. medial cutaneous nerve of forearm
   4MU

Question 24

medial pectoral nerve supplies

Answer 24

pectoralis minor and pectoralis major

Question 25

medial cutaneous nerve of the arm supplies the

Answer 25

skin on lower half of arm

Question 26

branches of the posterior cord

Answer 26

1. radial nerve 2. axillary/circumflex nerve 3. upper subscapular nerve 4. lower subscapular nerve 5. nerve to latissimus dorsi RAUL N

Question 27

axillary (circumflex) nerve divides into supplies becomes

Answer 27

anterior branch- deltoid muscle | posterior branch- becomes upper lateral cutaneous nerve of arm

Question 28

upper subscapular nerve supplies

Answer 28

upper part of subscapularis muscle

Question 29

lower subscapular nerve supplies

Answer 29

lower part of subscapularis muscle and teres major muscle

Question 30

nerve to latissimus dorsi is also called

Answer 30

thoraco dorsal nerve