Images of the brain of a normal person (left) & someone suffering from dementia,produced using positron emission tomography (PET). The contrast in colour between the left & right images illustrates the difference in metabolic activity between the normal & diseased brain. The term dementia describes a chronic & persistent mental disorder caused by organic brain disease. Symptoms include memory loss,personality change,impaired reasoning ability & disorientation. Dementia may arise in the very elderly (senility) or in younger people (pre-senile dementia). The term is used to describe Alzheimer's and Pick's diseases | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / National Institution of Health |
Taille de l’image : | 3540 px × 2479 px |
Model Release : | Non requis |
Property Release : | Non requis |
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