I have had this problem for a few years at least, but recently it is becoming more noticeable. The movement of my forehead (raising eyebrows, crinkling forehead) feels like stiff rubber in my muscles in my forehead. Like thick rubber or sticky glue, and sometimes I get the feeling in my eye movements and feel slightly dizzy when moving my eyes. Also, it feels like my forehead is drooping. But, I can tell you for sure it's not really drooping, and there is no actual problem in cranial nerve movements.
I have also had occasional peculiar sensations sink into my nose, tongue, lips and inside mouth...feels numb, but not really numb like the skin is numb, just a peculiar sensation in these areas. But the rubbery sticky feeling in my forehead movements is the one that's always there.
One year ago, I had an MRI of the brain due to frequent headaches, and nothing showed up in the brain.