Nervousness is running in circles.
OCD (obsessive-compulsive disorder) was previously called compulsive neurosis and includes compulsive acts and thoughts. These can be expressed in many ways.
Often - but not always - compulsions follow a meticulous pattern, such as turning the light on and off a certain number of times when you enter or leave a room, walking in a certain way, or making sure that you are only at the center of the sidewalk tiles runs.
A person with OCD can become enormously restless or scared if he cannot perform his rituals. The condition often has a negative impact on the quality of life and can be considered a handicap.
No reward for the right choice
In OCD patients, certain parts of the brain are on the small side: an area in the frontal lobe, the orbitofrontal cortex (OFC), and the cortex cingularis anterior (ACC). There is less traffic on the roads between those zones and the tail core in the limbic system.
The OFC and ACC are important when making decisions. If the cycle is out of balance, you will be afraid of making the wrong choices. That is why you always repeat an action in the hope of being rewarded and therefore reassured - but the reward is not forthcoming.