1. Structure of Peripheral Nerves

    1. bundle of nerves surrounded by connective tissue

    2. epineurium, perineurium, endoneurium

  2. Cranial Nerves

      twelve pairs of cranial nerves connect the brain to head, neck, and trunk

    1. most are mixed nerves, some are sensory only

    2. names of the cranial nerves indicate their primary functions or distribution of fibers.

    3. some cranial nerves are somatic and some are autonomic

  3. Spinal Nerves

      31 pairs of spinal nerves of the following distribution :
      cervical 8
      thoracic 12
      lumbar 5
      sacral 5
      coccyx 1

    1. these mixed nerves provide a two way communication between spinal cord and body

    2. Each nerve has a dorsal and ventral root

    3. dorsal root contains sensory fibers and has a dorsal root ganglion.

    4. ventral root contains motor fibers

    5. most spinal nerves combine to form plexuses

      Plexus Nerves
      Brachial (C5 - T1) axillary
      ulnar
      radial
      median
      musculocutaneous
      Lumbar ( L1 - L4 ) femoral
      obturator
      genitofemoral
      ilioinguinal
      iliohypogastric
      Sacral ( L4 - S3 ) sciatic
      peroneal
      tibial
      superior/inferior gluteal
      pudental