The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions. The anterior horn cells, although technically part of the central nervous system (CNS), are sometimes discussed with the peripheral nervous system because they are part of the motor unit.
In the peripheral nervous system, bundles of nerve fibers or axons conduct information to and from the central nervous system. The autonomic nervous system is the part of the nervous system concerned with the innervation of involuntary structures, such as the heart, smooth muscle, and glands within the body

Conditions and symptoms

1. New onset or change in pattern of headaches
2. Headaches that gradually become more frequent and more severe
3. Unexplained nausea or vomiting
4. Vision problems, such as blurred vision, double vision or loss of peripheral vision
5. Gradual loss of sensation or movement in an arm or a leg
6. Difficulty with balance
7. Speech difficulties
8. Feeling very tired
9. Confusion in everyday matters
10. Difficulty making decisions
11. Inability to follow simple commands
12. Personality or behavior changes
13. Seizures, especially in someone who doesn’t have a history of seizures
14. Hearing problems