Brachial Plexus Lecture

Front 1

What spinal nerves branch into the brachial plexus

Back 1

C5, C6, C7, C8, T1

Front 2

What three groups is the brachial plexus divided into? What stages are contained withing these groups?

Back 2

Grouped in relation to clavicle
Supraclavicular stage: Rami, trunk
Retroclavicular: Divisions
Infraclavicular: Cords, branches

Front 3

Which ventral rami make up the superior trunk

Back 3

C5, C6

Front 4

Which ventral rami make up the middle trunk

Back 4

C7

Front 5

Which ventral rami make up the inferior trunk

Back 5

C8, T1

Front 6

The cords of the brachial plexus are named acording to

Back 6

their position relative to the axillary artery, lateral, medial, and posterior

Front 7

Which divisions make up the lateral cord

Back 7

Anterior divisions of the superior and middle trunks

Front 8

Which divisions make up the medial cord

Back 8

Anterior divisions of the inferior trunk

Front 9

Which divisions make up the posterior

Back 9

Posterior divisions of all three trunks

Front 10

What are the 4 superclavicular branches off the brachial plexus? What ventral rami supply them?

Back 10

1.long thoracic, C5,6,7
2. Dorsal Scapular C5
3. suprascapular C5,6
4. subclavian C5, 6

Front 11

What are thre three branches off the lateral cord? what ventral rami supply them

Back 11

1. lateral pectoral nerve (C5,6,7)
2. musculocutaneous nerve C5,6,7
3. lateral root of median nerve C6,7

Front 12

What are the five branches of the medial cord? Which ventral rami supply them?

Back 12

1. medial pectoral C8,T1
2. medial brachial cutaneous C8, T1
3. Medial antebrachial cutaneous C8, T1
4. Ulnar C8, T1
5. medial root of median nerve C8, T1

Front 13

What are the 5 branches of the posterior cord? Which ventral rami supply them

Back 13

1. upper subscapular C5,6
2. lower subscapular C5, 6
3. thoracodorsal C6,7,8
4. axillary C5,6
5. radial C5,6,7,8, T1

Front 14

What is the relationship between the anterior division fibers and the muscles they innervate

Back 14

Anterior division fibers innervate the anterior muscles of the arm, forearm, and hand aka the flexors. Nerves containing fibers from the anterior divisions are the musculocutaneous, ulnar, median, lateral and medial pectoral.

Front 15

What is the relationship between the posterior division fibers and the muscles they innervate?

Back 15

the posterior division fibers innervate muscles in the posterior arm and forearm aka the extensors. The nerves include the axillary, radial, upper, middle, and lower subscapular nerves

Front 16

Which spinal rami supply the muscluocutaneous nerve

Back 16

C5,6,7

Front 17

After emerging lateral to the tendon of the bicpes the musculocutaneous nerve continues as the ____ nerve which supplies___

Back 17

After emerging lateral to the tendon of the bicpes the musculocutaneous nerve continues as the lateral antebrachial cutaneious (LABC) nerve which supplies the skin of the lateral aspect of the forearm

Front 18

In the cubital fossa, the median nerve gives rise to the ___ which supplies the deep muscles in the anterior forearm

Back 18

anterior interosseous nerve

Front 19

How does the ulnar nerve enter the hand

Back 19

Passes through the canal of guyon between the pisiform bone and the hook of the hammate and anterior to the carpal tunnel