Which nerves are assessed when checking for median, ulnar, or radial sensory function?

The correct answer focuses on the nerves that are directly involved in the sensory functions of the hand and forearm, specifically the median, ulnar, and radial nerves. These three nerves are essential for transmitting sensory information from the hand and fingers to the central nervous system.

The median nerve primarily innervates the palmar aspects of the thumb, index, and middle fingers, and part of the ring finger, providing sensory feedback from these areas. The ulnar nerve supplies sensation to the little finger and part of the ring finger, particularly the palmar and dorsal sides. Meanwhile, the radial nerve is responsible for the sensation over the back of the hand, particularly the thumb and the back of the hand corresponding to the first two fingers.

Thus, the assessment of sensory function concerning these nerves requires examining the specific pathways and areas of the forearm and hand where they operate. Knowing this ensures that medical professionals can accurately pinpoint any impairments in sensory function due to nerve injury or conditions.

The other choices relate to regions of the body that do not directly correspond to the functions of these specific nerves. The lumbar region pertains to the lower back and primarily affects the legs; the sacral region relates to the lower pelvis and legs, while the cervical region encompasses