Step 1

Anatomy 2

A 27-year-old woman visits her obstetrician for a routine prenatal exam. She is 29 weeks pregnant with her first child. Her only new complaint is two weeks of numbness in her hands that has been causing her to drop objects she is holding throughout the day. She reports that the numbness is worse in the morning and characterizes the sensation as "pins and needles." On physical examination, tapping just superficial to the flexor retinaculum reproduces the sensation. She exhibits a positive response to the Phalen maneuver. There is significant loss of sensation to light touch over the ventrolateral digits (thumb, index, and middle fingers).

Which of the following nerves is compromised in this patient?

  • A) Axillary nerve
  • B) Median nerve
  • C) Musculocutaneous nerve
  • D) Radial nerve
  • E) Ulnar nerve


Cristina Alcorta


Dr. Ted O'Connell

Last updated

Jan 08, 2023


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