BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY
Sciatic nerve. Coloured magnetic resonance imaging scan (MRI) of a pair of thighs. The muscles of the leg and the sciatic nerve (both yellow) and the surrounding flesh (blue) are seen. The sciatic nerve of the left thigh is marked by red arrows. The sciatic nerves have the largest diameter of any nerve in the body and are the major nerves of the legs.
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