20th February 2024

A 52-year-old male presents to the neurology clinic with altered sensation along his fourth and fifth digits.

A 52-year-old male presents to the neurology clinic with altered sensation along his fourth and fifth digits. He also notes that he has been struggling to grip objects and struggles to pinch objects. Inspection reveals wasting along the hypothenar eminence. A test is performed where he is required to hold a paper between his thumb and second digit while the examiner attempts to pull the paper away. 

Which of the following muscles is being tested?