Gross Anatomy USMLE Step 1 Practice Question
A 44-year-old man receives an intramuscular injection in the inferomedial quadrant of the buttock. He subsequently develops marked weakness of knee flexion and ankle dorsiflexion with foot drop. Vital signs are stable (BP 128/82, HR 82, RR 16). Electromyography shows denervation potentials in the tibialis anterior and biceps femoris muscles. He denies bowel or bladder dysfunction. Which nerve was most likely injured?
Answer choices
- ASuperior gluteal nerve
- BSciatic nerveCorrect answer
- CPosterior femoral cutaneous nerve
- DPudendal nerve
- EInferior gluteal nerve
- FCommon fibular nerve
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