Brachial Plexus

Question 1

brachial plexus is formed by

Answer 1

C5- C8 and part of T1

Question 2

Order of divisions of the brachial plexus

Answer 2

roots (ventral primary rami)
trunks
Division
Cords
Terminal branches

Question 3

Trunks

Answer 3

upper trunk- C5 and C6
Middle trunk- C7
lower trunk- C8-T1

Question 4

Divisions

Answer 4

Each trunk divided into three anterior and three posterior divisions

Question 5

cords

Answer 5

arranged around the second part of the axillary artery
Named according to the relationship with the axillary artery

Three posterior divisions form posterior cord
Anterior divisions of the upper and middle form lateral cord
anterior division of the lower trunk forms, the medial corn

Question 6

terminal branches

Answer 6

lateral cord-musculocutaneous nerve, lateral root of the median nerve

medial cord- medial root of the median nerve, ulnar nerve

posterior cord- axillary nerve, radial nerve

Question 7

Phrenic nerve

Answer 7

ventral primary rami
C3, C4, C5

Question 8

dorsal scapular nerve

Answer 8

ventral primary rami
C5

Question 9

long thoracic nerve

Answer 9

ventral primary rami
C5, C6, C7

Question 10

suprascapular nerve

Answer 10

from branches of trunk
superior trunk

Question 11

nerve to the subclavius

Answer 11

branches of the trunk
superior trunk

Question 12

medial cord branches

Answer 12

Medial pectoral nerve
medial brachial cutaneous
medial antebrachial cutaneous

Question 13

lateral cord branches

Answer 13

lateral pectoral nerve

Question 14

posterior cord branches

Answer 14

upper subscapular nerve
lower subscapular nerve
thoracodorsal nerve