This study is so limited in scope that the title is really misleading - "AI Use Reprograms the Brain" is not really a fair assessment of the study. The study focuses on one question: what is the effect of relying on an LLM writing your essay. The answer: it makes you forget how to write a good essay. I mean, I think its obvious that if you rely on an LLM to write for you, you effectually lose the skill of writing. But what if you use an LLM to teach you a concept? Would this also lead to a cognitive decline? I don't know the answer, but I think that is a question that ought to be explored.