USMLE Step 1- Quiz 2

A 28-year-old man has a minor injury as a result of motor car accident. He complains of severe pain due to a scratch on his scalp across the front hairline.

Which one of these nerves is related to this pain?

A-Trigeminal nerve

B-Facial nerve

C-Vagus nerve

D-Oculomotor nerve

E-Orbital nerve

The anterior scalp at this area is innervated by the ophthalmic branch of trigeminal nerve.

The correct answer is A



A 74-year-old man presents to the clinic with a complaint of palpitation and lightheadedness. Image studies revealed blockage of the artery to the SA node.

This artery arises from which of these arteries?

A-Left coronary artery

B-Right coronary artery

C-Circumflex artery

D-Anterior interventricular artery

E-Posterior interventricular artery

The artery to the SA node is supplied by the right coronary artery.

The correct answer is B




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