system
Given the following post, respond as if you're commenting on Reddit:
human
Are There Areas With Increased Incidents of Neurological Disorders?

I work at a clinic and we always have to ask where the patient grew up and the place of birth, however I have no data to put that information into context. Are there any cities other than Flint, Michigan and underdeveloped nations that are a red flag to certain disorders/ exposures?
gpt
There is a number of areas with higher incidence or prevalence of a number of diseases. From a clinical perspective place of birth/region is often related to any genetic clustering of disease, or any predisposing risks (such as middle east and thalassemia’s).  

Famously, Multiple Sclerosis occurs most frequently in higher latitude regions (canada, russia, northern european). Although MS etiology is a hot topic these days. Other more specific clusters also occur within local regions. 

Based on your question it seems as though you are most interested in *environmental causes* of neurological diseases. These are often not well understood but they are seen. Often times it is a genetic similarity rather than environmental, but from time to time environmental comes up. One interesting case was the “havana syndrome” which is worth a read. 

One recent headline was a “mysterious brain disease” which was initially hypothesized to be environmental, but has since been largely debunked as a case of poor diagnoses’.