A sensory node was a cybernetic device implanted within each Borg drone, that mediated a drone's sensory perceptions. The sensory node was connected to both the ocular node and the cortical node, located within the Borg cortical array. (VOY: "Equinox, Part II") In 2374, The Doctor adjusted Seven of Nine's sensory nodes to a phase variance of 0.15, allowing her to perceive the cloaked Srivani that had infiltrated USS Voyager. (VOY: "Scientific Method")