My 25 year old son has
Tourette Syndrome,he has related behaviours as well ie:OCD,oppositional defiant behaviours,adhd,add,He also had problems with gross and fine motor skills,heightened senses,ie:touch,taste and smell,
20 years ago there wasn't that much research being done.
Tourettes can also skip generations,or come out in nieces,nephews,brothers or sisters,it is more prevalent in males,the likelihood of someone getting Tourettes depends if both parents carry the gene.