Sally, Debbie, Shadiyah and Mariel--thanks for the replies!

The knee is still weak and bothering me, but I only get these spells sporadically--around every few months. My knee cap feels wobbly and it hurts like "h" to straighten my leg! I'm just curious as to whether it's spasticity or not, especially since I've never had any arthritis, inflammation or injury there.

While I don't generally have spasticity issues, I am a huge sufferer of those dreaded myoclonic jerks. I've been prescribed Tegretol, which works to some extent, but I hate taking the stuff! But it's better to take it then to have my body keep jack-knifing all night long...