Cutaneous innervation of palm. A, Palmar cutaneous branch of median nerve, present in 100% of specimens. B, Palmar cutaneous branch of ulnar nerve, present in 16% of specimens. C, Nerve of Henle, present in 40%. D, Transverse palmar cutaneous branches of ulnar nerve, present in 96%. E, Cutaneous nerves at risk for being transected by traditional incision used for carpal tunnel surgery.