Photo of the retina. Today's research on the retina focuses a great deal of attention on neurotransmission between the neurons of the retina. New techniques using autoradiography, immunology and molecular biology are developing specific stains for neurochemicals, their synthesizing enzymes or the nucleic acids manufacturing these chemicals, so that cells containing these compounds can be marked. The CAT scan is an X-ray machine that takes internal cross sections, or tomograms, of the brain, showing local blood flow and metabolic processes associated with pathology. Each pixel represents brain tissue which is about 1 mm.
Pixel intensity represents an average from tissue within the voxel.
This glossary includes definitions for over 200 brain injury related terms from HDI's Brain Injury Glossary . While the glamorous neuron often grabs the spotlight, neurons are neither the most common, nor necessarily the most important, cells in the nervous system. These techniques have revolutionized the ability to visualize diseased tissue that may be directly responsible for seizure onset that are not detected on traditional CT or MRI imaging. Has a color picture of a PETand MRI image. Throughout the progression of Alzheimer's Disease neurons rapidly deteriorate and brain tissue begins to show signs of accumulating senile plaques and tangles.