The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.
central nervous system - system of nerve tissues that controls the activities of the body. In vertebrates it comprises the brain and spinal cord.
peripheral nervous system - the nervous system outside the brain and spinal cord.
Alzheimers Disease - progressive disease that destroys memory and other important mental functions. There are more than 3 million cases a year in the US. Symptoms include irritability, personality changes, aggression, loneliness, anger, and/or mood swings. Prescription: Donepezil (Aricept), Galantamine (Razadyne),
Epilepsy is a disorder in which nerve cell activity in the brain is disturbed, causing seizures. There are about 200 thousand to 3 million cases per year in the US. Symptoms include anxiety, depression, or fear, muscle spasms or muscle twitch, or pins and needles. For treatments you can see a neurologist or a neurosurgeon.