Re: Another Question Please on Getting DX ?
Yes, I know of several people with MS who've had this test, usually combined with Nerve Conduction Testing (which they will probably do too).
If you do not have lesions, this is one way they can determine the extent of your nerve and/or muscle damage. Depending on the results, they may be able to narrow down the likely CAUSE, including MS, ALS, etc. (there are dozens of causes, but the apparent "problem" does help narrow down the cause).