Nervous System: The Most Common Cause Of Alzheimer's Disease

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Rosa Velazquez
Health Science
6th period
9 May 2016 Nervous System

The Nervous System is the network of nerve cells and fibers that transmits nerve impulses between parts of the body. Can also be said that it's a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. The nervous system includes both the Central nervous system and the peripheral nervous system. The Central nervous system is made up of the brain and spinal cord. Now the Peripheral nervous system is made up of the Somatic and Autonomic nervous systems. The Central nervous system is divided into two major parts which are the brain and the spinal cord. The brain lies within the skull and is shaped like …show more content…

Alzheimer's disease is a progressive mental deterioration that can occur in the middle or old age, due to generalized degeneration of the brain. It is the most common cause of premature senility. Parkinson's disease is a progressive disease of the nervous system marked by tremor, muscular rigidity, and slow imprecise movement, chiefly affecting middle-aged and elderly people. It is associated with degeneration of the basal ganglia of the brain and deficiency of the neurotransmitter dopamine. Something interesting about the nervous system is that we have millions of nerve cells. The number of cells even exceeds to the number of stars in the Milky Way. The human brain alone consists of about a hundred billion neurons. Sensory neurons change light, touch and sound into neural signals which are sent back to our CNS to help our body understand and react to it's surroundings. Only 4% of the brain's cells work while the remaining cells are kept in reserve. If all of our neurons in our body where lined up, it would be about six-hundred miles long. About 12% of people dream in black and white. Some people suppose that this has to do with childhood exposure to a black and white television. So people that dream in black and white typically are over fifty-five. There are 13.5 million neurons in the human spinal cord. The nervous system can transmit signals at speeds of a hundred meters (328) feet per second. The field of science that focuses on the study of the nervous system is called neuroscience. Neurology is the medical branch of the study and treatment, while doctors and surgeons in this field are called neurologists and neurosurgeons. Nerves in our body can be vulnerable to both physical damage and damage through diseases. Damage to nerves can cause great pain, loss of feelings, or loss of muscle control. Physiatrists help rehabilitate patients with nervous system

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