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The healthy human brain contains tens of billions of neurons specializes cells that process and transmit information via electrical and chemical terms of accessing a memory from the dark recesses of the brain, signals from the frontal cortex link to that memory via uncertain means, and the memory is reconstructed from the information available. Alzheimer’s dieses disrupt this communication among neurons, resulting in loss of function and cell death. The problem here is not that the memory is disappeared, but rather that they can not recall it.

Under ordinary circumstances the content of memory stays the same, no matter how many times it is taken out and read, but people with dementia are able to remember more emotional events and this is because memory also has an emotional aspect to it. This emotional memory is usually affected much later on in dementia.

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