16 Brachial Plexus (Overview)

Question 1

Describe the components of the brachial plexus

Answer 1

5 roots
3 trunks
6 divisions
3 cords
5 terminal branches

Question 2

What are the 5 roots of the brachial plexus?

Answer 2

Formed by the ventral rami of C5, C6, C7, C8 and T1

Question 3

What are the 3 trunks of the brachial plexus?

Answer 3

Superior (C5 and C6)
Middle (C7)
Inferior (C8 and T1)

Question 4

What are the 6 divisions of the brachial plexus?

Answer 4

Each trunk splits into an anterior and posterior division

Question 5

What are the 3 cords of the brachial plexus?

Answer 5

Lateral (anterior divisions of the superior and middle trunks)

Posterior (three posterior divisions)

Medial (anterior division of inferior trunk)

Question 6

What are the 5 terminal branches of the brachial plexus?

Answer 6

Musculocutaneous (off lateral cord)
Axillary (off posterior cord)
Radial (off posterior cord)
Median (from roots of the lateral and medial cord)
Ulnar (off medial cord)