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Refining the Lexicon of Mental Imagery Research: Terminology Beyond Absence
(www.researchgate.net)
I'm not involved in art at all however you seems to not be alone at all; take a look at :
If ADHD is recognized as a disability it's also because it can significantly impact a person's quality of life, even if some individuals learn to manage their symptoms, if you had to manage your issue I understand it may not have been for free