Given your husband's age and the relatively sudden onset of these symptoms, MS would be at the *bottom* of my list of concerns. Ask the neuro about vascular problems -- blockages of arteries, for example -- which could cause some of these symptoms.
Here's a website that describes the causes of myoclonic jerks, and it talks about strokes as a possible cause as well:
I hope he gets proper treatment soon!
...I am not a doctor, nor health professional, and don't pretend to be one, here.....