Да, любое интеллектуальное напряжение - это зарядка для мозга, развивает, углубляет способность воспринимать новые навыки.
Но изучение нового языка это не просто только интеллектуальная тренировка, это ещё и приобретение нового себя. Я давно заметила, что когда я говорю на английском, я не совсем обычная я, немного другая. Это, наверное, многие замечают и по себе. Может быть, такое воздействие на мозг таки может отодвинуть Алсаймерс.
И да, вот нагуглилось:
"The question “Are you another person when you speak another language?” has been answered in various ways by neurophysiologists, psycho- and sociolinguists and by cognitive scientists. They show how cognition and emotion go hand in hand, how the acquisition of a second language can give you a different sense of self, how bilinguals have different bodily rhythms, coordinate words and gestures differently, think different thoughts in one or the other of their languages."
Berkeley Language Center - "Are You Another Person When You Speak Another Language?"
"Foreign languages and thinking
Oprima dos for better cognition
May 8th 2012, 18:36 by R.L.G. | NEW YORK
MANY people report feeling like different people when they speak a foreign language. I've been sceptical of these claims, since many of them seem to line up too neatly with national stereotypes: "I feel warmer and more relaxed in Spanish," "German makes me reason more carefully" and the like. But a new study seems to show that people really do think differently in a foreign language—any foreign language. Namely, people are less likely to fall into common cognitive traps when tested in a language other than their mother tongue. ..." http://www.economist.com/blogs/johns...s-and-thinking