Brief Answer:
Explained below in detail.
Detailed Answer:
Hi,
Yes, psychiatric disorders are actually disorders of the brain. Usually, the anomaly is not in the structures of the brain but in the functioning of different structures. That is why, imaging studies like
CT scan or
MRI which study the structure of the brain, are usually normal in people with psychiatric disorders. Over the last couple of decades, there has been a lot of research that has helped us understand what changes occur in the brain in different psychiatric disorders. However, there is much that is still not well-understood. The most commonly found abnormality is in the levels and activity of different
neurotransmitters in different parts of the brain. This understanding has helped scientists develop many drugs to treat psychiatric disorders in the last few decades, whereas previously
psychotherapy was the only available mode of treatment.
Yes, people's brains order them what to do. For example, if you wish to drink a glass of water, first a part of your brain tells you that you are thirsty and need water. Another part decides where to get the water. Another part orders you legs to take you to the kitchen. Yet another part identifies the glass and water. It is yet another part which orders the hand to pour the water into the glass and take it your lips. There is a very complicated and delicate interaction between different parts of the brain to enable us to do even the simplest activity. Since most of this happens at the unconscious level, we are not aware of what is going on inside the brain. It is just like using where you are able to see the output but cannot see the complex of the information.
There has been some research that has suggested that left handed people are more prone to
depression, but this is not widely accepted as some other studies have found no association between the two.
Best wishes.
Dr Preeti Parakh
MD Psychiatry