About blaming all things on a "chemical imbalance". A chemical imbalance in the brain would affect it globally - all over. You would see affective (mood) changes, personality changes, impulse, activity, things like appetite etc BUT you would NOT see localized neuro symptoms like assymetrical weakness, localized paresthesias, spasticity here, but not there. That is hogwash.
That ""diagnosis"" is the result of a very mediocre mind!