Final answer:
A person with damage to their ulnar nerve will experience decreased sensation in the hand and fingers supplied by the ulnar nerve.
Step-by-step explanation:
A person who has damage to their ulnar nerve will have decreased sensation in the hand and fingers innervated by the ulnar nerve. The ulnar nerve supplies sensation to the little finger and half of the ring finger, as well as the corresponding part of the palm. Therefore, damage to the ulnar nerve can result in decreased sensation in this area.