Knee Joint Innervation — FRCA Primary MCQ

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ModerateAnatomyKnee Joint InnervationFRCA Primary

The nerve supply to the knee joint includes contributions from all of the following EXCEPT:

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Correct answer: C — Phrenic nerve

The knee joint receives innervation from branches of the femoral nerve (saphenous nerve / nerve to vastus medialis / nerve to vastus lateralis) / obturator nerve (posterior branch) / and sciatic nerve (via tibial and common peroneal components). Hilton's law states that nerves supplying a joint also supply the muscles moving that joint and the skin over them. The phrenic nerve has no involvement.

Reference: RCoA 2021 Primary FRCA Curriculum