we know that that's especially important in the hippocampus. hippocampul function is critical to memory. sueann: i thought i was losing my mind. here i had cancer and if that weren't bad enough i couldn't you know, handle daily things. and it affected my enjoyment of things as well. you know, i couldn't read a book, i couldn't get through a chapter of a book. so, it was a little frightening, and i wasn't sure if this was going to last, because i have heard that chemo brain can persist and in some people and i didn't know if i was going to be one of those people. merzenich: and we know from actually looking at the brains of people that have gone through chemotherapy. that they are responding abnormally, and they're responding abnormally in these critical centers that relate to memory to remembering, that relate to controlling the representation of information that's coming in rapid sequences or is played out in their actions in rapid sequences. so, just like an older person the brains of someone whose been through this chemical poisoning, and th