Being bilingual can help keep your brain in good condition

A silohuette of a side profile of a womans head inside her head space is a ocean sunset

Learning and understanding a new language is one of the most challenging things that your brain can do. But as well as the advantage of acquiring another language, it appears that the effort of giving your brain a good workout today by being bilingual could keep it in better condition in later life.

Research led by Dr. Daniela Perani, a professor of psychology at in Milan, found that people who speak two or more languages seem to weather the ravages of Alzheimer’s disease better compared to people who have only mastered one language. Alzheimer’s is a progressive mental deterioration that can begin in middle or old age due to generalized brain degeneration.

The study involved 85 people with Alzheimer’s – half of whom spoke both German and Italian and half who spoke only one language. The researchers found that bilingual patients had greater connectivity in key brain areas. This was especially in the part of the brain that governs “executive control” – a set of necessary behavioral cognitive processes that include problem-solving, working memory, reasoning and attentional control. The study also noted that the bilingual Alzheimer’s patients showed less severe symptoms of the disease.

The study concluded: “Our findings suggest that the effects of speaking two languages are more powerful than both age and education in providing a protection against cognitive decline.”

Bilingualism and the brain

Although Alzheimer’s disease is currently incurable, the study supports a popular theory that people who have higher levels of education function longer with little manifestation of the illness. Part of the reason why bilingual brains may be better at resisting Alzheimer’s could be due to a lifetime of switching between languages daily.

Learning and speaking more than one language changes how the brain carries out tasks that require focus and concentration on a certain piece of information without being distracted. It can also increase the density of white matter (connections) in the brain, meaning that there are more connections between brain parts, thus making this part of the brain more resistant to degeneration.

This is supported by a study conducted by a team led by Professor Ana Inés Ansaldo at the , which suggests that bilingual people have more robust and more efficient brains compared to those who only speak one language. This is one of the reasons why a bilingual brain can be a buffer against aging and dementia.

They recruited elderly people, half of whom spoke only one language and the other half who had learned a second language between the ages of 11 and 18. All performed equally well on a task that involved focusing on an object's color while ignoring its position, but brain scans revealed a big difference in how they processed the task.

“While bilinguals were recruiting very specific brain areas and a small number of areas to perform the task, monolinguals were recruiting a much larger number of areas that were consuming much more resources. And the networks they were using were very, very complex,” says Professor Ansaldo. “That led us to think that the bilingual brain was more efficient in terms of the amount of resources that bilingual people require to do complex tasks as opposed to the monolingual brain.”

The study concludes that bilingualism shapes the brain in a different way or how people approach complex tasks. It could be because bilinguals must inhibit the language they are not using to focus on the one that they are using.

Read our other blog post on about how language learning can help your mental health and wellbeing.

Learn more from our other blog posts

More blogs from app

  • A young child sat at a desk in a classroom writing

    Grammar: how to tame the unruly beast

    By Simon Buckland

    “Grammar, which knows how to control even kings”- ѴDZè

    When you think of grammar, “rule” is probably the first word that pops into your mind. Certainly the traditional view of grammar is that it’s about the “rules of language”. Indeed, not so long ago, teaching a language meant just teaching grammatical rules, plus perhaps a few vocabulary lists. However, I’m going to suggest that there’s actually no such thing as a grammatical rule.

    To show you what I mean, let’s take the comparative of adjectives: “bigger”, “smaller”, “more useful”, “more interesting”, etc. We might start with a simple rule: for adjectives with one syllable, add -er, and for adjectives with two or more syllables, use more + adjective.

    But this doesn’t quite work: yes, we say “more useful”, but we also say “cleverer”, and “prettier”. OK then, suppose we modify the rule. Let’s also say that for two-syllable adjectives ending in -y or -er you add -er.

    Unfortunately, this doesn’t quite work either: we do say “cleverer”, but we also say “more sober” and “more proper”. And there are problems with some of the one-syllable adjectives too: we say “more real” and “more whole” rather than “realer” or “wholer”. If we modify the rule to fit these exceptions, it will be half a page long, and anyway, if we keep looking we’ll find yet more exceptions. This happens repeatedly in English grammar. Very often, rules seem so full of exceptions that they’re just not all that helpful.

    And there’s another big problem with the “rule approach”: it doesn’t tell you what the structure is actually used for, even with something as obvious as the comparative of adjectives. You might assume that it’s used for comparing things: “My house is smaller than Mary’s”; “John is more attractive than Stephen”. But look at this: “The harder you work, the more money you make.” Or this: “London is getting more and more crowded.” Both sentences use comparative adjectives, but they’re not directly comparing two things.

    What we’re actually looking at here is not a rule but several overlapping patterns, or paradigms to use the correct technical term:

    1. adjective + -er + than
    2. more + adjective + than
    3. parallel comparative adjectives: the + comparative adjective 1 … the + comparative adjective 2
    4. repeated comparative adjective: adjective + -er + and + adjective + -er/more and more + adjective

    This picture is more accurate, but it looks abstract and technical. It’s a long way from what we actually teach these days and the way we teach it, which tends to be organized around learning objectives and measurable outcomes, such as: “By the end of this lesson (or module) my students should be able to compare their own possessions with someone else’s possessions”. So we’re not teaching our students to memorize a rule or even to manipulate a pattern; we’re teaching them to actually do something in the real world. And, of course, we’re teaching it at a level appropriate for the student’s level.

    So, to come back to grammar, once we’ve established our overall lesson or module objective, here are some of the things we’re going to need to know.

    • What grammatical forms (patterns) can be used to express this objective?
    • Which ones are appropriate for the level of my students? Are there some that they should already know, or should I teach them in this lesson?
    • What do the forms look like in practice? What would be some good examples?

    Existing grammar textbooks generally don’t provide all this information; in particular, they’re very vague about level. Often they don’t even put grammar structures into specific CEFR levels but into a range, e.g. A1/A2 or A2/B1, and none fully integrates grammar with overall learning objectives.

    At app, we’ve set ourselves the goal of addressing these issues by developing a new type of grammar resource for English teachers and learners that:

    • Is based on the Global Scale of English with its precise gradation of developing learner proficiency
    • Is built on the Council of Europe language syllabuses, linking grammar to CEFR level and to language functions
    • Uses international teams of language experts to review the structures and assess their levels

    We include grammar in the GSE Teacher Toolkit, and you can use it to:

    • Search for grammar structures either by GSE or CEFR level
    • Search for grammar structures by keyword or grammatical category/part of speech
    • Find out at which level a given grammar structure should be taught
    • Find out which grammar structures support a given learning objective
    • Find out which learning objectives are related to a given grammar structure
    • Get examples for any given grammar structure
    • Get free teaching materials for many of the grammar structures

    Think of it as an open-access resource for anyone teaching English and designing a curriculum.