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Home › Health › Anatomy › Spinal and Major Peripheral Nerves

Spinal and Major Peripheral Nerves





Spinal Nerves:There are 31 pairs of spinal nerves, grouped according to the region of the vertebral column from which they originate. Each pair monitors a specific region of the body surface.

  • Cervical nerves – 8 pairs (C1-C8)
  • Thoracic nerves – 12 pairs (T1-T12)
  • Lumbar nerves – 5 pairs (L1-L5)
  • Sacral nerves – 5 pairs (S1-S5);
  • Coccygeal nerves – 1 pair (Co1)

Major Peripheral Nerves: (nerve; spinal nerves that contribute; distribution points)

  • Phrenic – C3-C5 – diaphragm
  • Radial – C5-C8, T1 – skin and muscles of posterior arm, forearm, and hand, plus thumb and first two fingers
  • Median – C5-C8, T1 – skin and muscles of anterior arm, forearm, and hand
  • Ulnar – C8, T1 – skin and muscles of medial arm, forearm, and hand, plus little finger and ring finger
  • Intercostal – T2-T12 – intercostal muscles, abdominal muscles, and skin of trunk
  • Femoral – L2-L4 – skin and muscles of anterior thigh, plus medial leg and foot
  • Sciatic – L4-S3 – skin and muscles of posterior thigh, leg, and foot.




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