Bell's palsy is a condition that affects the peripheral nervous system the most.
1. **Peripheral Nervous System**: This system is responsible for connecting the central nervous system to the rest of the body. In the case of Bell's palsy, the swelling around the facial nerve on one side disrupts the transmission of nerve signals to the facial muscles, leading to the appearance of droopiness in the affected muscles.
2. **Central Nervous System**: The central nervous system consists of the brain and spinal cord, which are not directly affected by Bell's palsy. The condition primarily involves the peripheral nerves that branch out from the brainstem and spinal cord to reach the facial muscles on one side of the face.
Therefore, Bell's palsy affects the peripheral nervous system the most because it involves the impairment of nerve function outside the brain and spinal cord, specifically in the facial region.
