In the 1992 Studies Conducted by Baxter and Colleagues, Patients

Multiple Choice

In the 1992 studies conducted by Baxter and colleagues, patients with obsessive-compulsive disorder (OCD) were provided with cognitive-behavioural therapy but no drugs.What important result did the brain imaging show?

A) Neither OCD symptoms nor neurotransmitter function had improved.
B) Neurotransmitter circuits are the direct and only cause of OCD.
C) The patients' OCD symptoms improved without changes in neurotransmitter function.
D) The neurotransmitter circuits of the brain had been normalized.