DR MO HABERT, PITIE-SALPETRIERE, ISM / SCIENCE PHOTO LIBRARY DR MO HABERT, PITIE-SALPETRIERE, ISM / SCIENCE PHOTO LIBRARY
Progressive supranuclear palsy. Coloured single photon emission computed tomography (SPECT) scans of axial sections through the brain of a patient with progressive supranuclear palsy (PSP). PSP is caused by lesions over the primary motor cortex. On the scans these show as areas of low blood flow (green, upper centre of brain). Symptoms include; loss of balance with frequent falls, inability to control eye movements, personality changes and muscle rigidity. There is no cure for the condition. SPECT scans use gamma cameras to detect radioactive tracers, injected into the blood, that accumulate in areas of high metabolic activity.
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