Typically, a Functional Neurologist serves in the same consulting manner as a medical neurologist. The difference is that the therapies or applications of a functional neurologist do not include drugs or surgery.
Functional Neurology looks at dysfunction of the nervous system as subtle changes before they become distinct pathologies. If you’ve already had a life-threatening condition that has been treated by a medical neurologist (i.e. a concussion or traumatic brain injury), but there is still dysfunction, a functional neurologist would diagnose and correct that dysfunction. Its non-invasive (no surgery), drug free, and works.