MTV True Life - I Have Touretts

[Dire]

I had an astrophys professor with touretts. He would twitch a bit and then cluck like a chicken somewhere between 5 and 10 times during a 50 minute lecture. In trying to describe his clucking by imitation to others, I found that it is actually very difficult to make a convincing clucking sound.

I was always curious if this was a direct effect of touretts or if the clucking replaced swearing by medication or mental training of some sort.