This is from Cynthia's bio: "Diagnosed with severe PN probably caused primarily by cervical and lateral spinal compressions. Simultaneously diagnosed with Moderate Cognitive Decline.

"I have learned that there are similarities in symptomology of both diseases and both can be aggravated significantly by medication. I've also learned that everyone experiences diseases of any type differently. Sure there may be some similarities, but there are also significant differences."

My question: What is PN?