FCEM2-1259

FCEM2-1259

A patient in their late 40s has sustained an injury to their right upper limb and is now experiencing peripheral neuropathy as a result. During the examination, it is observed that their hand is clawed, with the metacarpophalangeal joints hyperextended and the distal and proximal interphalangeal joints of the little and ring fingers flexed. Additionally, there is a slight weakness in wrist flexion, which is accompanied by abduction. The patient also reports sensory loss over the anterior and posterior surfaces of the medial one and a half fingers, as well as the corresponding area of the palm.

Which nerve has been affected in this case?