PROF. J. LEVEILLE / SCIENCE PHOTO LIBRARY PROF. J. LEVEILLE / SCIENCE PHOTO LIBRARY
Brain activity in Alzheimer's. Single-photon emission computed tomography (SPECT) scan showing the blood flow, and therefore metabolic activity, in the brain of a patient with Alzheimer's disease. This scan shows an absence of activity in the posterior cerebral cortex.
Model release not required. Property release not required.