If SSRI are tapered gradually after the long term use, this tapering start bringing back the normal brain physiology. This is the whole idea of tapering the drug that decreasing doses, let the brain adapt the changing environment gradually. Read about the SSRI long term use and myths and facts in this authentic site;
As I mentioned that these effects are gradually already waning off with the tapering doses, so the brain cell do adapt to the new milieu. I agree there can be individual side effects like memory, reading, etc but all of them are fully reversible and do return to normal witin a span of 3-6 months.
Hope this helps you. Please feel free for your follow up questions.
The 10 year use can take some substantial time to come back to terms fully, but as I mentioned things start coming back to normal physiological levels as soon as the doses are tapered. The memory and reading are not only affected by the inherent brain functions, but are also related to the training. Many people, just by persistent efforts and hard training can get better in these faculties. This is more or less believing on yourself.
Yes. It can take some time. This time is very individual. Some people will have only a week's time to recover while some will have slightly substantial time to come back to terms of withdrawal.