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 ear is the organ that detects sound. It not only receives sound, but also aids in balance and body position. The ear is part of the auditory system. Often the entire organ is considered the ear, though it may also be considered just the visible portion.In most mammals, the visible ear is a flap of tissue that is also called the pinna (or auricle in humans) and is the first of many steps in hearing.Vertebrates have a pair of ears placed somewhat symmetrically on opposite sides of the head. This arrangement aids in the ability to localize sound sources.he ear is the organ that detects sound. It not only receives sound, but also aids in balance and body position. The ear is part of the auditory system. Often the entire organ is considered the ear, though it may also be considered just the visible portion.