TS is a neurological disorder characterized by tics, involuntary, rapid sudden movements, or vocalizations that occur repeatedly in the same way. Before tic onset, individuals with TS experience a "premonitory urge" similar to the feeling that precedes yawning. Tic disorders and TS are frequently accompanied by other conditions such as ADHD and OCD.
Researchers believe that tics are caused by an excess of dopamine in the brain. The caudate nucleus, located in the basal ganglia, is regulated by dopamine and acts to curb certain motor impulses. When the brain is acting normally, just enough dopamine binds to the caudate nucleus to ensure that motor impulses remain at the optimum level. If too much dopamine binds, the caudate nucleus cannot control motor impulses effectively and a person becomes susceptible to tics.
Eyelights therapy can calm down outburst activity occurring within the cortical layers of the brain. Light therapy can be used to enhance serotonin production, allowing for a readjustment in dopamine levels.
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