I am by all accounts neurotypical (except perhaps for a touch of Aspergers) but I have an involuntary tic. Every now and then (like once or twice a week) a memory of some incredibly stupid thing that I once did -- sometimes decades ago -- will pop into my head and before I can re-establish conscious control I'll make a vocalization that sounds like a cross between a whimper and a sneeze. It's kind of embarrassing, but usually I cover it up with a cough afterwards. I don't think anyone has ever actually noticed except me.
I am by all accounts neurotypical (except perhaps for a touch of Aspergers) but I have an involuntary tic. Every now and then (like once or twice a week) a memory of some incredibly stupid thing that I once did -- sometimes decades ago -- will pop into my head and before I can re-establish conscious control I'll make a vocalization that sounds like a cross between a whimper and a sneeze. It's kind of embarrassing, but usually I cover it up with a cough afterwards. I don't think anyone has ever actually noticed except me.
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[1] https://en.wikipedia.org/wiki/Earworm
[2] https://en.wikipedia.org/wiki/Intrusive_thought