For dogs that had been under the influence of curare when they first learned the response, after the curare was no longer in their system, they were less likely to remember to draw their paw away on hearing the buzzer. Once they were given curare again, the response returned.[1] This result indicated that the dogs' ability to recall the responses was connected to their state of consciousness. Girden and Culler's research opened the door for further investigation of the influences of state of consciousness on an organism's ability to encode memory.