Cat's Mouth Quivers When He Eats - Any Ideas?

Sampson is 13 years old and about a year ago had radioiodine treatment for his HyperThyroid. This quiver developed afterwards, but it could have nothing to do with the treatment or HyperThyroid. He has had recent dentistry with extractions and a biopsy of his gum that turned out to be only inflammation. This doesn't seem to hurt him and it is just on one side of his face now - earlier it had been his entire face. I can hear his jaw "clack" sometimes when this happens. Anyone ever seen this before? NOTE: you might have to cut and paste the YouTube link into your browser.

http://www.youtube.com/watch?v=ZowaDneo1kk

Thank you.
Memory Russell

Edited to say that the video is not working correctly on YouTube - at least on my browser. I can email the video - it is only 10 seconds - to anyone who wants to take the time to look at it.

This message was edited Oct 4, 2012 7:04 PM