No need to be sorry. Can't learn unless we ask, right?
Neurological issues have to do with the brain. The brain runs on electrical impulses, and if there's something blocking those signals such as damage, a congenital defect, or a tumor, it can't give the right commands to the rest of the body.
The brain and body are highly sophisticated and complex, and if even one small thing is off kilter, it can have devastating results.