I failed to mention that I also had MRI of my cervical spine and lower extremity doppler.

These are the CNS demylinating diseases that I found on the net:

Multiple Sclerosis - (according to my doctor, based on the head MRI, I dont have this.)
Optic neuritis
Devic disease (neuromyelitis optica)
Transverse myelitis
Acute disseminated encephalomyelitis
Adrenoleukodystrophy and adrenomyeloneuropathy

I dont have symptoms of any of the above conditions, except that I have dry eyes. But, I dont have Sjogren's syndrome.

Thanks again!