PAM of Hypoxia (VIDEO) Duke University This video is under embargo. Please login to access this video. Caption The video shows how photoacoustic microscopy images the brain’s vasculature. The video on the left shows the blood flow within the brain, and the colored video on the right includes colors to show the changing levels of oxygenation in the capillaries. When the vasculature turns blue, the brain is experiencing hypoxia, which causes the vessels to dilate. Credit Junjie Yao, Duke University Usage Restrictions Usage with credit 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.