The nervous system transmit signals throughout the entire body.
Central Nervous System & Peripheral Nervous System
The central nervous system is made up of the brain and the spinal cord. The peripheral nervous system is made up of the nerve fibers that come of the spinal cord and expand to all the body, including the neck and arm, torso, legs, skeletal muscles and internal organs.
Functions of Major Region
- Cerebral hemispheres: They control the activity of the lower levels, directing overall plan and direction of behavior.
- Diencephalon: The region of the embryonic vertebrate that gives rise to posterior forebrain structure.
- Brain Stem: Regulates vital body functions like cardiac and respiration functions, and acts as a vehicle for sensory information.
- Cerebellum: Receives information from the sensory system, spinal cord, and other parts of the brain and then regulates motor movement.
Parkinson's disease happens when there is a problem with a certain nerve cells in the brain that control movement. Some symptoms may be slower movement, rigid muscles, speech changes, and writing changes. A symptom that someone gets in the early stages another person may get later or not at all. About 1 million people in the U.S. are living with Parkinson's disease. About 60,000 people are diagnosed each year in the U.S. This disease has no cure, but dedication and therapy is used to treat the symptoms.
Alzheimer's disease damages the brain and causes a steady loss of the memory and how well someone can speak, think, and do daily activities. Increasing forgetfulness or mild confusion may be the first symptoms you see only. Over time the disease takes more memory especially recent memories. Another may be difficult on organization of thoughts. An estimated 5.2 million Americans have Alzheimer's disease in 2014. There is no cure at the moment. Medication may help with both cognitive and behavioral symptoms.