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Nerves arising from S1


- See Innervation:

  Gluteal, Inferior:                L5, S1, S2
  Gluteal, Superior:            L4, L5, S1
  Peroneal Nerve:               L4, L5, S1, S2
  Posterior Femoral:                    S1, S2, S3
  Sciatic:                      L4, L5, S1, S2, S3
  Tibal:                        L4, L5, S1, S2, S3



- Exam: w/ lesion of to S1 - S2 level of spinal cord there is weakness of hip abductors and ankle plantar flexors and toe flexors



The significance of an absent ankle reflex.