Induced expression of c-Fos (IMAGE) Fujita Health University Caption Fig. 2: X-ray-induced luminescence induced the expression of c-Fos (a marker of neuronal activation) in excitatory opsin-expressing cells of mice. 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.