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Sammie - I noticed that this went unanswered for a few days - unusual on this site for most questions. I believe it's just too technical. I suggest that you contact a physician - the doc that provided this diagnosis would be a good place to start. You should not have to make an appointment just place the call and ask for some clarification. Even talking with their nurse might be a good idea.

Here's a definition of cortical dementia from the internet:
# Cortical dementias arise from a disorder affecting the cerebral cortex, the outer layers of the brain that play a critical role in thinking abilities like memory and language. Alzheimer's and Creutzfeldt-Jakob disease are two forms of cortical dementia. People with cortical dementia typically show severe memory loss and aphasia -- the inability to recall words and understand language.
# Subcortical dementias result from dysfunction in the parts of the brain that are beneath the cortex. Usually, the forgetfulness and language difficulties that are characteristic of cortical dementias are not present. Rather, people with subcortical dementias, such as Parkinson's disease, Huntington's disease, and AIDS dementia complex, tend to show changes in their speed of thinking and ability to initiate activities.

If I were to guess, I'd say that the "moderate severity of cognitive impairment 61st. percentile" means impairment is at 61% compared to others tested BUT - given the complexity of such studies, it's hard to know. You really need to pose these questions to a doctor.
Best of luck to you.
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LynnPO, Thank you so much. I have been doing some resreach on this ...What I found was that he is in the 4TH. or5th. stage of dementia. He gets really ageataded or nervers. I saw him as he was setting and talking to me and a frenid rolling and trigting his hands. He Don't seem to understand a lot of what is going on. He gorgets when or how long it has been sence he had eatten.Won't sleep in his bed any more. He sleeps in the den in a love seat that recline. I don't know how I will get him to go back to his bedroom when it comes time for a hospital bed. He says that there inthen wrong with him. And i can't talk about it to him.He hs an A-FEB. HEART. And that in its self is hard to deal with.I do the best i can. He goes to the DR. the 29th. Thank's
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I was just told that this is what I suffer from,along with Adhd,what can be done to help me with memory problems &is this something that disability will cover
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