I get those also also. My doctor told me they aren't seizures or I would be unconscious. However, I have seizures in absencia. Which is a minute of staring off into space. These are completely unrelated to the jerking movements. They are not seizures. I also have an scs., two actually. They started after it, but I never made the connection.
I have yet to find anything that marks them better, and find they're worse when I'm tired.