Which of the following is correct regarding neurosurgery for obsessive-compulsive disorder (OCD)?

A) Ablation of the frontal cortex is most likely to produce improvement in OCD symptoms.
B) Ablation of the cingulum bundle is most likely to produce negative cognitive changes in OCD patients.
C) Neurosurgery works best when followed by drug treatment.
D) Ablation of the cingulum bundle is most likely to produce improvement in OCD symptoms.
E) Neurosurgery is the most common treatment for OCD.

Answer: D
Rationale: Ablation of the cingulum bundle is most likely to produce improvement in OCD symptoms.