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Formation of spinal nerve

Spinal segments. Formation of spinal nerve. Somatic nerve. Cervical plexus C1-4. Brachial plexus C5-8 T1. Thoracic nerve. Lumbar plexus L1-4. Sacral plexus L4 L5 S1-4. Spinal segments. Formation of spinal nerve. Intrinsic back muscle. Posterior root. Posterior ramus. Spinal ganglia.

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Formation of spinal nerve

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  1. Spinal segments Formation of spinal nerve Somatic nerve Cervical plexus C1-4 Brachial plexus C5-8 T1 Thoracic nerve Lumbar plexus L1-4 Sacral plexus L4 L5 S1-4

  2. Spinal segments

  3. Formation of spinal nerve Intrinsic back muscle Posterior root Posterior ramus Spinal ganglia Spinal nerve anterior root Anterior ramus Somatic motor nerve fiber Sensory nerve fiber

  4. Carry sensation Formation of spinal nerve Somatic sensory nerve fiber afferent Posterior ramus Posterior rootlet Posterior root Somatic motor nerve fiber Spinal nerve Anterior rootlet Anterior root Somatic sensory nerve fiber 31 pairs Anterior ramus efferent Somatic motor nerve fiber form the somatic plexus Innervate voluntary muscle

  5. Somatic nerve plexus

  6. Cervical plexus C1-4 Cutaneous branchs

  7. Phrenic nerve C3-C5 Muscular branch

  8. Brachial plexus C5-8 T1 root trunk division cord

  9. Branch of the roots Long thoracic nerve

  10. Serratus anterior

  11. Branch of the lateral cord Lateral root of median nerve Musculocutaneous nerve

  12. Coracobrachialis Biceps brachii Brachialis Lateral cutaneous nerve of forearm

  13. Branch of the medial cord Medial cutaneous nerve of arm Medial cutaneous nerve of forearm Ulnar nerve

  14. Median nerve Ulnar nerve

  15. Muscular branch of ulnar nerve Adductor pollicis 3、4 Lumbricales Interossei Hypothenar Flexor carpi ulnaris Flexor digitorum profundus muscle

  16. Cutaneous branch of ulnar nerve

  17. Muscular branch of median nerve Pronator teres Flexor carpi radialis Palmaris longus

  18. Flexor digitorum profundus Flexor pollicis longus

  19. Cutaneous branch of median nerve

  20. Branch of the posterior cord Axillary nerve Thoracodorsal nerve Latissimus dorsi Radial nerve

  21. Axillary nerve

  22. Radial nerve

  23. Muscular branch of radial nerve Extensor carpi radialis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris Triceps brachii

  24. Cutaneous branch of radial nerve

  25. Thoracic nerve Lateral cutaneous branch Anterior cutaneous branch

  26. Intercostobrachial nerve

  27. Lumbar plexus L1-4

  28. Femoral nerve (L2-L4) Muscular branch of femoral nerve All muscles in the anterior compartment of thigh Pectineus muscle Cutaneous branch of femoral nerve Anterior aspect of the thigh Saphenous nerve Medial side and of the leg and foot

  29. Obturator nerve (L2-L4) Obturator canal All muscles in the medial compartment Skin on the medial side of the upper thigh

  30. Cutaneous branch of Lumbar plexus Ilio-inguinal nerve Genitofemoral nerve Lateral cutaneous nerve of the thigh

  31. Sacral plexus L4 L5 S1-4

  32. L4 L5 Dorsal division S1 Sacral plexus Ventral division S2 S3 S4 S5 Co

  33. Lumbosacral trunk Superior gluteal Inferior gluteal Common fibular part Tibial part Pudendal nerve Posterior femoral cutaneous nerve

  34. Superior gluteal nerve Pudendal nerve Inferior gluteal nerve Posterior cutaneous nerve of thigh

  35. Sciatic nerve Tibial part of the sciatic nerve Muscles in the posterior compartment of leg Except short head of biceps femoris

  36. Tibial nerve Muscles in the posterior compartment of leg Muscles of foot Sural nerve Posterolateral surface of the leg Lateral side of the foot

  37. Commen fibular nerve Sural communicating nerve Lateral sural cutaneous nerve Superficial fibular nerve Deep fibular nerve

  38. Superficial fibular nerve Medial branch of dorsal surface of foot Lateral branch of dorsal surface of foot Fibularis longus

  39. Deep fibular nerve Tibialis anterior Extensor digitorum longus Extensor hallucis longus

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