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Nerve Supply of the Lower Limb The lumbo-sacral plexus Learning Outcomes You should be able to… • Explain where the lumbar and sacral plexuses arise • Describe the distribution of all the nerves • Describe the course of the major nerves and identify where each is vulnerable to injury • Explain and use basic clinical terminology related to nerve damage • Use basic anatomical principles to predict the effects of damage to nerve roots and peripheral nerves Plexi in Relation to the Spine & Pelvis Ref: Patten, Neurological Differential Diagnosis 1977 Nerves of the Lumbar Plexus • • • • • • Ilioinguinal Iliohypogastric Genitofemoral Lateral femoral cutaneous Femoral Obturator Nerves of the Sacral Plexus • • • • • • • Superior gluteal Inferior gluteal Nerve to quadratus femoris Nerve to obturator internus Sciatic (tibial, common fibular) Posterior femoral cutaneous Pudendal Dermatomes of the Lower Limb Ref: Moore & Dalley, Clinically Oriented Anatomy, 5th edn Cutaneous Nerve Supply Ref: Moore, Clinically Oriented Anatomy 3rd Ed. Cutaneous nerve supply of the lower limb • Ref: Moore & Dalley (2006) Clinically Oriented Anatomy (5th edition): Tables 5.1 & 5.15