My mother's dementia has made me wonder about early signs. Three distinct things happened to her about 7 years before her dementia diagnosis. She lost her ability to enjoy reading, and couldn't concentrate even though she had been an avid reader. She lost her sense of smell. Lastly she became so urgent and uptight, a characteristic she always had but to a new extreme. (These all coincided with the beginning of her searching for lost words, and she was about 73 years old). Are any of these things documented early signs?