Skull ganglia

Dal hands Gwyn pen

Dal grips a stylus with his skull ganglia

The skull ganglia was a flexible prehensile appendage attached to the back of the head of Dal R'El, a hybrid Augment created by Arik Soong's protégés. Dal used it to manipulate tools, and it could also move involuntarily when he experienced strong emotion. (PRO: "A Moral Star, Part 1", "Crossroads", "Masquerade")