Brachial Plexus

Question 1

What is the anterior rami?

Answer 1

divisions of the cervical spinal nerves and first thoracic spinal nerve

Question 2

Roots

Answer 2

anterior rami of the spinal nerves

Question 3

Trunks

Answer 3

Roots converge to form trunks
- Superior
-Middle
-Inferior

Question 4

Roots of Superior Trunk

Answer 4

C5-C6

Question 5

Roots of Middle Trunk

Answer 5

C7

Question 6

Roots of Inferior Trunk

Answer 6

C8-T1

Question 7

Divisions

Answer 7

One division moves anteriorly and the other posteriorly. 3 anterior and 3 posterior nerve fibers

Question 8

Axilla

Answer 8

an area that lies underneath the glenohumeral joint, at the junction of the upper limb and the thorax. A passageway where neurovascular and muscular structures can enter and leave the upper limb.

Question 9

Cords

Answer 9

Formed once the divisions enter the axilla, named by their position relative to the axillary artery.

Question 10

Formation of Lateral Cord

Answer 10

anterior division of superior trunk
anterior division of middle trunk

Question 11

Formation of Posterior Cord

Answer 11

Posterior division of superior trunk
Posterior division of middle trunk
Posterior division of inferior trunk

Question 12

Formation of Medial Cord

Answer 12

Anterior division of inferior trunk