The nervous system includes the brain, spinal cord, nerves and sense organs, such as the eyes and ears. This system receives, transmits and integrates information from inside and outside the body. The brain and spinal cord form the central nervous system, while the peripheral division of the nervous system includes sensory organs and all the nerves that connect the spinal cord to the rest of the body.
Many different types of diseases can affect the nervous system, including birth defects, infections, inflammatory conditions, poisoning, metabolic disorders, nutritional disorders, injuries, degenerative diseases, or cancer. Neurologic diseases are often more common in a particular breed or sex, or tend to occur at a certain age.