16th August 2023

A 35-year-old computer programmer complains of neck pain radiating down the lateral aspect of his arm and forearm, reaching the thumb

A 35-year-old computer programmer complains of neck pain radiating down the lateral aspect of his arm and forearm, reaching the thumb. Upon examination, you find weakness in elbow flexion and reduced sensation over the lateral forearm, thumb and index finger.

Which nerve root is likely to be affected?