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.
The eye. The eye is a sense organ that responds to light. Structure of the human eye. Light enters through the pupil, and is focused by the cornea and the lens onto the retina.The shape of the lens can be changed by the ciliary muscles so that the image always comes to a sharp focus at the retina.he eye. The eye is a sense organ that responds to light. Structure of the human eye. Light enters through the pupil, and is focused by the cornea and the lens onto the retina.