Brain Scan (IMAGE) IOS Press Caption Representative brain SPECT scans in a patient with Alzheimer's dementia showing substantially reduced brain blood flow in the temporal and parietal lobes compared to a person with depression with mild decreased frontal lobe blood flow. Credit Amen Clinics 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.