Detecting Visual Response in Rats (IMAGE) Graphene Flagship Caption The graphene-based neural probes were used to detect rats' responses to visual stimulation, as well as neural signals during sleep. Both types of signals are small, and typically difficult to measure. Credit ICN2 Usage Restrictions Only with appropriate credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.