This is the study of how drugs affect moods, sensations, thinking, and behavior. It's essentially the science behind the "new parts" in our analogy.
Antipsychotic Drugs: These are medications used primarily to manage psychosis, including delusions, hallucinations, paranoia or disordered thought. They're one type of "new part" a mechanic might use.
This is a procedure where small electric currents are passed through the brain intentionally triggering a brief seizure. It's an example of a "repair" in our analogy.