This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
Brain areas involved with obsessive compulsive disorder include all except: 
Select and explain. 
A. corpus callosum, B. Orbitofrontal coex, C. Basal ganglia, D. Head of caudate nucleus
A: corpus callosum
Answer: A: corpus callosum 
Explanation: Neuroanatomical Structures Involved in OCD Orbitofrontal Coex Caudate (which is a pa of Basal Ganglia) Thalamus Extra edge: Other impoant Brain areas and associated psychiatric disorders : Psychiatric Disorders Brain Areas involved 1. Anxiety disorders Locus ceruleus Raphe nucleus Caudate nucleus Temporal coex Frontal coex 2. Depression Damage to the left frontal lobe 3. Alzheimer's disease Hippocampus