USMLE Step 1

USMLE Step 1 QUESTION of the DAY!

Following his car accident, Mr. Meyer was told to get an MRI of his cervical spine. The MRI showed that Mr. Meyer had some damage to his left T1 spinal rami. Which of the following will most likely be affected?

A) triceps reflex
B) flexion of the 4th finger
C) thumb opposition
D) biceps reflex
E) supination

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USMLE Step 1 D.O.C. of the DAY!
Answer: B) flexion of the 4th finger and also the 5th finger. C8 and T1 form the lower trunk that eventually lead to the ulnar nerve. C5 and C6 form the upper trunk then contribute to the musculocutaneous nerve (answers D & E would be affected). C7 forms the middle trunk and then contributes to the axillary, radial, and median nerve (answer C would be affected by damage to C7 because of its median nerve contribution & answer A would be affected by damage to C7 because of its radial nerve contribution).


USMLE Step 1 D.O.C. of the DAY!

Drug of choice for

Clostridium difficile causing pseudomembranous colitis

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Metronidazole


USMLE Step 1 Fact of the Day!

Lead Poisoning
-Heme and globin production enzymes are inhibited by lead
-High urine coproporphyrin III
-Serum Iron can be normal or mildly increased
-Serum Ferritin is increased
Findings on peripheral smear: RBC Basophilic stippling