As the biological seat of mental life, the brain is center stage in the investigation of what causes and characterizes mental disorders ... have some symptoms in common but not others.

One study in the US found that obsessive-compulsive personality disorder is the most common (7.9%), followed by NPD (6.2%) ...

Insomnia, the most common sleep disorder, is defined as having difficulty ... When you have narcolepsy, your brain is unable ...

Dr. Uma Naidoo is on the forefront of nutritional psychiatry and teaches at Harvard Medical School - on top of that, she's a ...