The Brachial Plexus

The Brachial Plexus

1. Lateral + Medial Cord

   • Median n. (C5-T1)
     • Anterior Forearm(except 1 1/2), Thenar mm
     • palm and lateral 3 1/2 digits (PLUS NAIL)
     • flexor retinaculum at the wrist compression

2. Medial Cord

   • Ulnar n. (C8,T1)
     • nerve compression through flexor carpi ulnaris
       • hamlet bone fracture
     • Sup. Ulnar Collateral a.
     • 1 1/2 mm. in anterior forearm, intrinsic hand mm
     • medial 1 1/2 digits

3. Lateral Cord

   • Musculocutaneous n. (C 5,6,7)
     • Lateral Forearm
     • Anterior Arm
     • rarely injured, but muscle hypertrophy could compress

4. Posterior Cord

   • Axillary n. (C5,6)
     • Deltoid
     • Teres Minor
     • Lateral Shoulder
     • PHC a.
     • fracture of humeral surgical neck, dislocation of humerus
   • Radial n. (C5-T1)
     • Posterior Arm/Forearm
     • Prof. Brachial a.
     • Posterior Arm/Forearm
     • lateral 3 1/2 digits of dorsal hand (NO NAILs)
     • mid-shaft humeral fracture, lateral epicondyle

5. Injury

6. Artery

7. Muscle

8. Cutaneous