article_snippet.sent: Tourette's syndrome is a neurological condition affecting the brain and nervous system that causes sufferers to make involuntary noises and movements called tics.
article_snippet.sent: Tics can be vocal - such as grunting, coughing or shouting - or physical – such as the jerking of the head or jumping up and down.
article_snippet.sent: The exact cause of Tourette's is unknown but The exact cause of Tourette can come on suddenly, usually in children or teenagers, but also in adulthood.
article_snippet.sent: The exact cause of Tourette is believed the condition is brought on by a problem with the basal ganglia, which are a group of specialised brain cells located deep inside the brain.
article_snippet.sent: The exact cause of Tourette is thought that the problems may be caused by excessive levels of a naturally occurring chemical called dopamine.
article_snippet.sent: Another theory is that Tourette’s syndrome may be linked to an infection in which antibodies produced by the body to fight the infection interact with brain tissue, affecting the brain's functioning. '