Mayo Foundation for Medical Education and Research. (2018, August 8). Tourette syndrome. Mayo Clinic. Retrieved December 23, 2022, from https://www.mayoclinic.org/diseases-conditions/tourette-syndrome/symptoms-causes/syc-20350465 

University of Texas at Austin

- Simple Tics are sudden, brief and repetitive tics that only involve a limited number of muscle groups (eye blinking, head jerking, shoulder shrugging, eye darting, nose twitching, mouth movements, grunting, coughing, throat clearing, barking)
- Complex Tics are distinct, coordinated patterns of movements involve several muscle groups (touching or smelling objects, repeating observed movements, stepping in a certain pattern, obscene gesturing, bending or twisting, hopping, repeating own or others' words/phrases, using vulgar, obscene or swear words)

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