The brachial plexus innervates the shoulder girdle and upper limb.
The lumbosacral plexus supplies the pelvic girdle and lower limb. It can be further subdivided into a lumbar plexus and a sacral plexus.
Nerve plexus and major Nerves: (plexus; major nerve; distribution)
- Cervical plexus - phrenic nerve – diaphragm
- C1-C8 – other branches – muscles of the neck and skin of upper chest, neck, and ears
- Brachial plexus- axillary nerve – deltoid and teres minor muscles and skin of shoulder
- Musculocutaneous nerve – flexor muscles of the arm and forearm – skin on lateral surface of forearm
- Median nerve – flexor muscles of forearm and hand – skin over lateral surface of hand
- Radial nerve – extensor muscles of the arm, forearm, and hand and skin on posterolateral surface of the arm
- Ulnar nerve – flexor muscles of forearm and small digital muscles, as well as skin of medial surface of hand
- Lumbosacral plexus – obturator nerve – adductors of hip and skin over medial surface of thigh
- Lumbar plexus (T12-L4) – femoral nerve – adductors of hip, extensors of knee, and skin over medial surfaces of thigh and leg
- Sacral plexus(L4-S4):
- Gluteal nerve – adductors and extensors of hip and skin over posterior surface of thigh
- Sciatic nerve – flexors of knee and ankle, flexors and extensors of toes, and skin over anterior and posterior surfaces of leg and foot
- Saphenous nerve – skin over medial surface of leg