A 54-year-old man arrives at the clinic complaining of excruciating discomfort in his left neck and shoulder area for several months. He has also experienced numbness and weakness in his left hand. The patient has no recollection of any big trauma and no prior medical concerns. He attempted chiropractic and massage treatments, but the problems remained. The left upper extremity examination reveals diminished feeling in the palm, index, and middle fingers, as well as weakness in the left wrist extension. The deep tendon reflexes of the left biceps and brachioradialis are normal, while the triceps reflex is weak. The evaluation of the right upper extremity is normal. The most likely cause of this patient's neurologic symptoms is a lesion affecting which of the following identified parts of the brachial plexus?

Question

Quizplus · Accepted Answer

Eductional Objective: Motor and sensory abnormalities in numerous peripheral upper extremity nerves (e.g., radial and median) suggest a lesion in the brachial plexus at the terminal branch development. In the absence of a history of trauma or malignancy, nerve root compression caused by cervical spondylosis is the most likely etiology (cervical radiculopathy).

A 54-Year-Old Man Arrives at the Clinic Complaining of Excruciating