anterior crural nerve

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fem·o·ral nerve

arises as a branch of the lumbar plexus, conveying fibers from the second, third, and fourth lumbar nerves through the substance of the psoas muscle and enters the thigh via the retroinguinal muscular space posterior to the inguinal ligament, lateral to the femoral vessels; it arborizes within the femoral triangle into muscle branches to the sartorius, pectineus, and quadriceps muscles and anterior femoral cutaneous branches to the skin of the anterior and medial region of the thigh; its terminal branch is the saphenous nerve by which it supplies the skin of the medial leg and foot.
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