That isn't a very scientific name, but it describes the condition exactly.
Small white dogs (Maltese, West Highland white terriers, Bichon Frise) can develop tremors for unexplained reasons that can be very severe. These dogs usually have really bizarre eye movements and get much worse when excited or stressed.
The usual treatment for this is to give diazepam (Valium Rx) to control the tremors and prednisone because we don't know what else to do.