A historian challenges a labor-history fable. Timothy Messer-Kruse doesnât remember her name, but the question she asked in his college classroom a dozen years ago changed his career â and now it may revolutionize everything historians thought they knew about a hallowed event in the imagination of the American Left.
Though the effects of the disease are similar, there are two main types. 1  Early-onset Alzheimer's. This type happens to people who are younger than age 65. 2  Late-onset Alzheimer's. This is the most common form of the disease, which happens to people age 65 and older.
Memory Types: A Fine-Grained Speculation On Digital Dementia. In an article from the Johns Hopkins Memory Bulletin, Peter V. Rabins identifies four different memory systems that are relevant in discussions of Alzheimer's: episodic memory, semantic memory, procedural memory, and working memory.