"In the beginning, when I wasn't sure what was happening to me, I just figured it must be stress because I was doing a lot of work and had too much on my mind," Gutierrez-Parker said.
Another few months passed, and she found herself re-reading the same passage in documents to comprehend their meaning. When her command of language also began to fail, Gutierrez-Parker, who lives in Yakima, Washington, began to worry.
"Why did I just say that? That's not grammatically correct," she would think. " 'That wasn't me. I have a very strong vocabulary.' I was a very articulate person."