Hand - Anatomy

Question 1

What does the radial nerve proper come off of in the brachial plexus and what does it innervate (4)

Answer 1

Posterior cord
-triceps, brachioradialis, ECRL, ECRB

• all other extensors are innervated by PIN *

Question 2

what muscles do the AIN branch of the median nerve innervate? What does the median nerve branch from in the plexus? (3)

Answer 2

Branches from medial and lateral cords

AIN innervates FDP, FPL, Pronator quadratus