Mechanical Itch (IMAGE) Scripps Research Institute Caption Scientists at Scripps Research have identified a protein in sensory nerves that works as a key detector of itch. Credit iStock Usage Restrictions With related coverage and 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.