Final answer:
The dorsal ulnar sensory innervation in the hand includes the dorsal surface near the interosseous membrane and the posterior surface of the distal ulna, affecting sensory feedback of the ulnar side of the hand and fingers.
Step-by-step explanation:
The dorsal ulnar sensory innervation in the hand includes the dorsal surface of various anatomical structures. Particularly, it concerns the sensory distribution to aspects of the hand that are proximal to the interosseous membrane and the posterior surface of the distal ulna. The nerves in this area give sensory feedback from the dorsal aspect of the ulnar side of the hand and fingers. There are also several muscles involved in the movement of the hand, such as the extensor carpi ulnaris, which aids in the extension and adduction of the hand. Furthermore, the extensor retinaculum plays a vital role as a band of connective tissue that covers and protects the tendons crossing the dorsal surface of the wrist.