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5th lumbar spinal nerve (L5)

Function: - hallux dorsiflexion - sensory lateral leg, dorsal foot Physical examination: - walking on heels test motor function at L4-L5. - light touch in the dorsal foot tests sensory function at L5. Innervation: 1) extensor hallucis longus 2) extensor digitorum brevis Pathology: - referred pain a) L5 ganglion -> anterior leg or foot b) L5 & S1 -> lateral or posterior calf c) L5 -> dorsum of foot [2]

Related

dermatome myotome

General

lumbar spinal nerve

References

  1. Medical Knowledge Self Assessment Program (MKSAP) 11, 18. American College of Physicians, Philadelphia 1998, 2018.
  2. Harrison's Principles of Internal Medicine, 13th ed. Isselbacher et al (eds), McGraw-Hill Inc. NY, 1994, pg 73-74
  3. Geriatrics at your Fingertips, 21st edition, 2019 Reuben DB et al (eds) American Geriatric Society ISSNL 1553-152X, ISBN 978-1-886775-62-6

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