Conditional place preference tests (IMAGE) Fujita Health University Caption Fig. 3: Conditional place preference tests revealed that X-ray-induced scintillation activated excitatory opsins, thereby inducing activating neurons, resulting in the change of place preference behavior. Credit Takayuki Yamashita from Fujita Health University 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.