Hello, bandonpaul and welcome to NeuroTalk.
I found some information at the Mayo Clinic that may or may not be helpful:
http://www.mayoclinic.com/health/ess...tremor/DS00367
I have Multiple Sclerosis (MS) and tremors can be a symptom of this disease but I don't remember ever hearing MS tremors referred to as essential tremors.
Here is some information about tremors related to MS:
http://www.nationalmssociety.org/abo...mor/index.aspx