An idea about the spectrum

This post is more for my readers with an interest in neurology. I know what happens when you get damage to the serotonin neuro receptor; you get autism, when its the dopamine receptor you get schizophrenia, but what happens when both are damaged? I started thinking a few days ago this might manifest as classic autism. I'm just playing with the idea at the moment, im trying to fit it in with everything else ive learnt as a hypnotic researcher. Just a thought I thought I would share. D