Review Question - QID 213340

A 34-year-old G2P1 female at 37 weeks of gestation presents to the clinic for complaints of right-hand numbness and pain for the past month. She reports that the pain is usually worse at night and that she would sometimes wake up in the middle of the night from the “pins and needles.” She denies fever, weakness, or weight changes but endorses paresthesia and pain. The patient also reports a fall on her right hand 2 weeks ago. A physical examination demonstrates mild sensory deficits at the first 3 digits of the right hand but no tenderness with palpation. Strength is intact throughout. Which of the following findings would further support the diagnosis of this patient’s condition?