Mental Disorders Diagnosed in Childhood - Tic Disorders - Etiology

Etiology

No definitive cause of tic disorders has been declared, but for the most part, the etiology lies within biological, chemical, or environmental factors. Studies have shown that abnormal neurotransmitters, such as dopamine and serotonin, which are active in chemical messages in the brain, can serve as a cause of tic disorders. Researchers have also found abnormal changes in certain parts of the brain that cause strain on the blood flow within the brain, which is likely a contributor of tic disorders. 75% of tic disorders have a genetic component. It appears that tic disorders can be caused or worsened by recreational or prescription drug use. Tics can form simply if a person repeats sounds or words they hear over the course of a normal day.

Read more about this topic:  Mental Disorders Diagnosed In Childhood, Tic Disorders