The crew of the USS Voyager encountered such a phenomenon twice in their journey through the Delta Quadrant. The first such instance was in 2375, during an encounter with a unique species which existed in a natural state of unconsciousness. While asleep, this species produced a neurogenic field, which they could also induce in others, trapping them in a state of collective unconsciousness, as they did with the Voyager crew. While under the influence of this field, the crew experienced an extremely convincing and collective dream, which they all experienced from their own point-of-view. Commander Chakotay and The Doctor, as the only crewmembers left unaffected, were able to locate the planet on which this species was hiding, and successfully deactivate the transmitter which they were using