Which nerve is responsible for innervating the fingers?

The digital nerve is responsible for innervating the fingers, making it the correct answer. This nerve provides sensory innervation to the skin of the fingers, allowing for the perception of touch, pain, and temperature. The digital nerves branch from the median and ulnar nerves and work specifically with the fingers, which is crucial for fine motor skills and tactile sensations that are essential for tasks such as manicuring.

The radial nerve, while important in the arm and hand, primarily innervates the posterior part of the arm and forearm, governing muscle movement rather than finger sensation. The median nerve does play a role in the sensation and muscle control of certain fingers, particularly the thumb, index, and middle fingers, but it ultimately branches into the digital nerves. The ulnar nerve provides sensation primarily to the little finger and part of the ring finger, but again, it contributes to the digital nerves that specifically innervate those fingers.

Thus, recognizing the specific innervation role of the digital nerve is key for understanding sensory functions in the fingers.