19th February 2024

A 45-year-old with known acromegaly presents with weakness in his hands bilaterally.

A 45-year-old with known acromegaly presents with weakness in his hands bilaterally. He describes pain and tingling along his fingers, predominantly over the thumb and index finger. He also describes weakness in his hands as he notes increasing difficulty gripping objects. 

Given the likely diagnosis, which of the following median nerve branches has likely been affected?