SGrade/USMLE Step 1/Anatomy — Core Concepts
Anatomy — Core Concepts Practice Questions
This topic covers essential Anatomy principles as tested in USMLE Step 1.
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Sample questions
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A 3-year-old boy presents with progressive difficulty breathing. Chest X-ray reveals an elevated left hemidiaphragm. Further evaluation confirms diaphragmatic paralysis. Which nerve is responsible for the motor innervation of the diaphragm?
Examiner's Design Intent
Tests fundamental neuroanatomy knowledge essential for understanding respiratory failure and neuromuscular disorders in clinical practice
A newborn presents with her right arm held in a 'waiter's tip' position: adducted, internally rotated, and pronated, with absent Moro reflex on the right side. This condition is most likely caused by damage to which part of the brachial plexus?
Examiner's Design Intent
Tests ability to correlate classic clinical presentation (waiter's tip) with precise anatomical knowledge of brachial plexus organization and injury patterns
A 55-year-old male undergoes thyroidectomy for papillary carcinoma. Postoperatively, he develops hoarseness and difficulty speaking. Laryngoscopy reveals paralysis of the left vocal cord. Which nerve was most likely damaged during the surgery?
Examiner's Design Intent
Tests integration of surgical anatomy, nerve function, and clinical presentation - core USMLE Step 1 competency linking basic science to clinical consequences
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