People living in areas with less sunlight have less opportunities to adjust their circadian clock and therefore, are at a higher risk of developing obsessive-compulsive disorder (OCD).
Personalized OCD treatment can be offered to OCD patients based on the key differences in brains that can help predict who would respond to exposure-based therapy or stress-based therapy.
In radiosurgery - "gamma knife" is used to deliver an intense beam of radiation to anterior cingulate cortex - an area of brain that causes OCD symptoms.