Does medication to treat Obsessive-Compulsive Disorder reduce associated cognitive deficits?
Look up Jeffery Schwartz. He has done decades worth of scientific studies with hundreds of OCD patients. In his book "You Are Not Your Brain" (worth a read) he mentions this bad brain wiring or cognitive deficits are the culprit behind the "Deceptive Brain Messages (OCD).

His studies show that self directed neuro-plasticity make the most corrections in brain wiring - and that the medicine can be an aid in the self directed steps. These self directed steps rely on the mind to alter the physical brain.