L1.3.2.2.2.2: Brachial Plexus

• Brachial Plexus: C5-C8, T1
• Axillary

  Deltoid muscle and skin of shoulder, Muscles and skin of superior thorax

  Paralysis and atrophy of deltoid muscle
• Radial

  Triceps and extensor muscles of the forearm , Skin of posterior upper limb

  Wristdrop (inability to extend hand at wrist)
• Median

  Flexor muscles and some muscles of hand , Skin of lateral ⅔ of anterior hand and posterior of fingers 2 and 3

  Inability to abduct hand, flex and abduct thumb and index finger Therefore can’t pick up small objects
• Musculocutaneous

  Flexor muscles of arm , Skin of lateral forearm

  Decreased ability to flex forearm at elbow
• Ulnar

  Some flexor muscles of anterior forearm , Wrist and many hand muscles , Skin of medial hand

  Clawhand (inability to spread fingers apart)