How are you? Tremor is generally caused by problems in parts of the brain that control muscles in the body. It is possible that neurological disorders such as multiple sclerosis, stroke, traumatic brain injury, and neurodegenerative diseases may be responsible. If you experienced the symptoms that you mentioned - slurring words, stuttering, twitching hands, and memory loss, it is important that you discuss this with your attending physician for proper evaluation. Additional diagnostic tests will also be helpful. Take care and do keep us posted.