19th February 2024

A 56-year-old female sustained a workplace injury where her arm was suddenly jerked forward while grabbing machinery several months ago.

A 56-year-old female sustained a workplace injury where her arm was suddenly jerked forward while grabbing machinery several months ago. Since then, she has noted progressively worsening sensory loss along her fourth and fifth digits and the medial aspect of the arm and forearm. Examination has revealed hypothenar wasting with interosseous muscle wasting. She also describes a weakness in her grip strength, affecting her hand function.

Which of the following nerve roots has been affected?