Riyi Shi (IMAGE) Purdue University Caption Riyi Shi at Purdue University developed a "mini-brain" lab on a chip to trace the link between concussion and Alzheimer's disease. Credit Purdue University photo/ Charles Jischke Usage Restrictions none License Original 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.