I do not know about Lauren Bar disease, but what you probably heard was Guillain-Barré disease. This condition causes progressive muscle weakness and sometimes a complete inability to use a particular muscle or muscle group. It develops over days or up to four weeks and lasts several weeks or even months. It is not usually causing memory loss or other mental problems. However, there are many other reasons for memory loss in I hope you will have your mother examined by a neurologist because some of the causes of memory loss may be treatable.