Endogenously-Released Noradrenaline Improves Visual Detectability (IMAGE) Osaka University Caption Endogenously-released noradrenaline improves visual detectability via β adrenergic receptor, and thereby animal is able to discern the difficult-to-find object (grating stimulus in the present study). Credit Osaka University Usage Restrictions None 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.