Review Question - QID 210192

A 62-year-old right hand dominant nurse comes to your clinic with complaint of 3 years of off and on bilateral numbness and tingling. She reports symptoms in her thumb, index, and middle fingers that wakes her from sleep. Figure A shows a clinical photograph of her hands. Flexion of her wrist worsens her symptoms and tapping over her carpal tunnel causes sharp pain into her thumb, index, and middle fingers. She has two point discrimination to 3mm in her ring and small fingers and 10mm in the remainder of her fingers. Her colleague in neurology suggested electrodiagnostic studies to confirm the suspected diagnosis. Which of the following is true regarding an electrodiagnostic studies in this scenario?