Neuropsychological Impact Essay Example | Topics and Well Written Essays - 1250 words

Neuropsychological Impact - Essay Example On the other hand, impulses were sent by waves on unmyelinated fibers. If a single peripheral fiber has been damaged, the myelins sheath gives off a track that is responsible for its regeneration. The myelin sheath does not always attain the perfect regeneration for each fiber. Sometimes, the correct muscles fibers are nowhere to be found so some motor neurons of the peripheral nervous system die. When the myelin layer is damaged, the individual may be prone to a higher level of dysfunctionality. Unmyelinated fibers and myelinated axons of the mammalian central nervous system do not regenerate. The reason for this is that the CNS of mammals in enclosed in the spinal column, which has a lesser deal of trauma rather than the peripheral nervous system. Research shows that optic nerve fibers in postnatal rats can regroup. But its regeneration often depends on two conditions namely: axonal die-back has to be prevented with appropriate neurotrophic factors and neurite growth inhibitory com ponents have to be inactivated. This led the scientists to further understand the regeneration of nerve fibers in mammalian CNS. For invertebrates, propagation of action potentials in unmyelinated axons is sufficient to run fast. To accelerate the speed, the axon should be a little larger. Increasing the speed of action potentials and increasing the diameter of the axon is not possible in vertebrates. Angeli et al.' s (2010) mentions that Squid giant axons spread up to 1 mm in diameter and have a great speed. Mammalian nerves have about 400 fibers in the same cross-sectional area as the squid giant axon. So if every nerve fiber is size of the squid giant axon, every nerve in mammals would be about 2 cm in diameter. Thus a different... This paper stresses that MS affects the ability of nerve cells in the brain and spinal cord, in communication with each other. Nerve cells communicate by electrical signals called action potentials on long-fiber axons that are wrapped in an insulating substance called myelin. In MS, the immune system attacks and damages the myelin. In case of loss of myelin, axons can no longer effectively carry signals. Name comes from multiple sclerosis, scarring and in particular in the white matter of the brain and spinal cord, which consists mainly of myelin. Although much is known about the procedures involved in the disease, the cause remains unknown. Theories include genetics or infections. Many environmental risk factors have been found. Almost all of the neurological symptoms may occur with the disease and often progresses to physical and cognitive disabilities. MS takes several forms, with new symptoms occurring either accumulates in discrete attacks or slowly over time. This report makes a conclusion that there is no known cure for multiple sclerosis. Treatment attempted return of function after an attack, preventing new attacks and prevent disability. MS drugs can have side effects or bad to be tolerated and many patients pursue alternative treatments, despite the lack of support for scientific studies. The prognosis is difficult to predict, depending on the subtype of disease, disease characteristics of each patient; the first symptoms and the degree of disability the person experiences as time advances, the life expectancy of patients 5-10 years younger with respect to the affected population.