Organophosphate brain damage. Coloured magnetic resonance imaging (MRI) scan of a man's brain showing damage caused by organophosphate poisoning. The brain is seen in horizontal (axial) section with the front of the head at top. The brain's fluid-filled ventricles (green) and clefts (sulci) have become greatly enlarged. Organophosphates are often used in insecticides, for example in sheep dips use - Stock Photo