Welcome to Cake, LuckyLady. 🙂
I've been reading a book by a respected professor who believes neurons adapt in the brain just as muscles adapt to exercise. If your day is full of distractions, then your neurons adapt to short quick interruptions and actually change their physiology — like long distance runners whose muscles adapt for endurance at the cost of losing their ability to sprint. He believes the constant short distractions make it so our neurons lose their ability to write novels or complex computer code because they are no longer adapted to deep focus.