Excerpt from Israelseen.com article at

https://israelseen.com/prof-sam-lehman-wilzig-israels-real-long-term-threat-not-what-you-think/

“Indeed, recent neurological research has shown this happening within the brain. Students were split into three groups: 1) on a given topic, writing an essay all by themselves; 2) using Google Search to find sources and then writing that essay; 3) providing their AI with instructions to write an essay on the same subject.

The results: far more brain connections were added in the first group than in the third (the second was in the middle). Moreover, the third (AI-written) group had trouble recalling almost anything in “their” essay whereas the first group was able to recollect almost everything those students wrote by themselves.”