Unlike Alzheimer's disease, which shrinks the hippocampus causing progressive memory loss, white matter disease is a more diffuse mind-robbing condition that targets small blood vessels deep within the brain's white matter. The disease hardens the tiny arteries, gradually restricting nutrients to white matter -- the connections between brain regions involved in executive abilities such as planning, organizing, problem-solving, and attention.
The eye is a part of the nervous sytem, which is essentially a network of neurons that coordinate actions and transmits signals throughout the body. There are two parts to the â¦ nervous system: central and peripheral.he nervous system. Your eyes are part of your brain. The majority of. your brain surface is light-sensitive.
1 the retina The retina is the inner layer of the eye. 2  It contains the light receptors, the rods and cones (and thus serves as the film of the eye). 3  The retina also has many interneurons that process the signals arising in the rods and cones before passing them back to the brain. This not only reduces the amount of light entering the eye but also improves its image-forming ability (as does stopping down the iris diaphragm of a camera). 2  the retina The retina is the inner layer of the eye. 3  It contains the light receptors, the rods and cones (and thus serves as the film of the eye).