We just had a huge conversation about this. I am forwarding you the link to that post as I think it will be very helpful for you. Or you can look down today's posts and find it, whichever is easier.
Swallowing Problems in MS
http://www.medhelp.org/posts/Multiple-Sclerosis/Swallowing-problems-with-eating-or-drinking/show/1251948
Swallowing issues are very, very important. I was dx with it while in the hospital last month. We could see that the muscles in the back of my tongue and throat were not coordinating and that once I swallow, particles of food were going down the wind pipe and not the food pipe.
They suspected that I was having a swallowing problem because at the time I was admitted to the hospital, I was still recovering from aspiration pneumonia. This is a very serious condition that can potentially result from not swallowing properly.
Please read the thread and if you have more questions, by all means say so and we'll all be happy to help.
Take good care.
Julie