Lecture 6: Brachial plexus

Question 1

Direct branches from ventral rami

Answer 1

Dorsal scapular nerve-C5

Long thoracic nerve- C5-C7

Question 2

Trunks of brachial plexus

Answer 2

Superior C5-C6
Middle C7
Inferior C8-T1

Question 3

Direct branches from superior trunk

Answer 3

Suprascapular nerve C5-C6

Nerve to subclavius C5-C6

Question 4

Anterior divisions

Answer 4

Carry fibers from trunks to anterior compartments of upper extremity
Form lateral and medial cords

Question 5

Posterior divisions

Answer 5

Carry fibers from trunks to posterior compartments of upper extremity
Form posterior cord

Question 6

Lateral cord formed from

Answer 6

From anterior divisions of upper and middle trunk

Question 7

Posterior cord formed from

Answer 7

From posterior divisions of all trunks

Question 8

Medial cord formed from

Answer 8

From anterior divisions of lower trunk

Question 9

Direct branch off lateral cord

Answer 9

Lateral pectoral nerve (C5-C7)

Question 10

Terminal nerves of lateral cord

Answer 10

Musculocutaneous C5-C7

Lateral root of median nerve C5-C7

Question 11

Direct branches of medial cord

Answer 11

Medial pectoral nerve (C8, T1)
Medial cutaneous nerve to arm (T1)
Medial cutaneous nerve to forearm (C8, T1)

Question 12

Terminal branches of medial cord

Answer 12

Ulnar (C8-T1)

Medial root of median nerve C8, T1

Question 13

Direct branches of posterior cord

Answer 13

Upper subscapular nerve C5(6)
Thoracodorsal nerve C6-C7
Lower subscapular nerve C(5)6

Question 14

Terminal branches of posterior cord

Answer 14

Radial nerve C5-T1

Axillary nerve C5-C6