Human Nervous System

The central and major peripheral nerves of the human body from head to limbs.

• Brain: Central control organ of the nervous system housed within the cranium.
• Spinal cord: Cylindrical bundle of nerve fibers extending down the vertebral canal from the brainstem.
• Cervical plexus: Network of nerve fibers formed by the ventral rami of the upper cervical spinal nerves.
• Brachial plexus: Network of nerves originating in the neck and passing into the axilla to innervate the upper limb.
• Intercostal nerves: Somatic nerves arising from thoracic spinal nerves extending along the ribs.
• Radial nerve: Major nerve of the upper limb innervating posterior arm and forearm muscles.
• Median nerve: Primary nerve extending down the middle of the anterior forearm to the hand.
• Ulnar nerve: Nerve running near the ulna innervating intrinsic hand muscles and the medial side of the hand.
• Lumbar plexus: Nerve plexus in the lower back formed by the ventral rami of lumbar nerves.
• Sacral plexus: Nerve plexus arising from the lower lumbar and sacral spinal nerves.
• Femoral nerve: Largest nerve of the lumbar plexus, innervating anterior thigh muscles.
• Obturator nerve: Nerve arising from the lumbar plexus supplying the adductor muscles of the thigh.
• Sciatic nerve: Thickest and longest nerve in the human body, passing down the posterior thigh.
• Tibial nerve: Terminal branch of the sciatic nerve continuing down the posterior calf to the sole of the foot.
• Common fibular nerve: Branch of the sciatic nerve winding around the neck of the fibula to supply the anterior and lateral lower leg.