biology

Neuroscience of multilingualism

Neuroscience of multilingualism is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Neuroscience of multilingualism rather than just read about it. In short: Neuroscience of multilingualism is the study of multilingualism within the field of neurology. These studies include the representation of different language systems in the brain, the effects of multilingualism on the brain's structural plasticity, aphasia in multilingual individuals, and bimodal bilinguals (people who can speak at least one sign language and at least one oral language).

Key takeaways

Neuroscience of multilingualism belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Neuroscience of multilingualism to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Neuroscience of multilingualism from memory before moving on to harder problems.

Reference excerpt

Neuroscience of multilingualism is the study of multilingualism within the field of neurology. These studies include the representation of different language systems in the brain, the effects of multilingualism on the brain's structural plasticity, aphasia in multilingual individuals, and bimodal bilinguals (people who can speak at least one sign language and at least one oral language). Neurological studies of multilingualism are carried out with functional neuroimaging, electrophysiology, and through observation of people who have suffered brain damage. The brain contains areas that are specialized to deal with language, located in the perisylvian cortex of the left hemisphere. These areas are crucial for performing language tasks, but they are not the only areas that are used; disparate parts of both the right and left brain hemispheres are active during language production. In multilingual individuals, there is a great deal of similarity in the brain areas used for each of their languages. Insights into the neurology of multilingualism have been gained by the study of multilingual individuals with aphasia, or the loss of one or more languages as a result of brain damage. Bilingual aphasics can show several different patterns of recovery; they may recover one language but not another, they may recover both languages simultaneously, or they may involuntarily mix different languages during language production during the recovery period. These patterns are explained by the dynamic view of bilingual aphasia, which holds that the language system of representation and control is compromised as a result of brain damage. Research has also been carried out into the neurology of bimodal bilinguals, or people who can speak at least one oral language and at least one sign language. Studies with bimodal bilinguals have also provided insight into the tip of the tongue phenomenon, working memory, and patterns of neural activity when recognizing facial expressions, signing, and speaking.

Overview

Centralization of language areas in the brain Language acquisition in multilingual individuals is contingent on two factors: age of the language acquisition and proficiency. Specialization is centered in the perisylvian cortex of the left hemisphere. Various regions of both the right and left hemisphere activate during language production. Multilingual individuals consistently demonstrate similar activation patterns in the brain when using either one of the two or more languages they fluently know. Age of acquiring the second-or-higher language, and proficiency of use determine what specific brain regions and pathways activate when using (thinking or speaking) the language. In contrast to those who acquired multiple languages at different points in their life, those who acquire multiple languages when young, and at virtually the same time, show similar activations in parts of Broca's area and left inferior frontal lobe. If the second-or-higher language is acquired later in life, specifically after the critical period, the language becomes centralized in a different part of Broca's area than the native language and other languages learned when young.

Brain plasticity in multilingualism A greater density of grey matter in the inferior parietal cortex is present in multilingual individuals. It has been found that multilingualism affects the structure, and essentially, the cytoarchitecture of the brain. Learning multiple languages re-structures the brain and some researchers argue that it increases the brain's capacity for plasticity. Language learning boosts brain plasticity and the brain's ability to code new information. Early language learning plays a significant role in the formation of memory circuits for learning new information. Most of these differences in brain structures in multilinguals may be genetic at the core. Consensus is still muddled; it may be a mixture of both—experiential (acquiring languages during life) and genetic (predisposition to brain plasticity). Experience can change both the function and the structure of the brain. Event-related brain potentials (ERPs) reflect synchronized postsynaptic activity in cortical pyramidal neurons. ERPs can be used to track learning-related changes in brain function. Semantic anomalies elicit a negative wave which suggests the separation between semantic and syntactic processing Heightened brain plasticity in infants impacts later language development. Recent studies show that even brief exposure to a language in infancy changes how the brain processes a second-language acquisition. Participants in the studies who had transient language exposure as an infant or were multilingual showed greater brain activation in non-verbal working memory patterns, compared to monolingual speakers. The measure of uncommitted neural circuitry in infants can be accounted for in the perception of nonnative language at early stages of language acquisition. Research has shown that infants who show proficiency in nonnative phonetic perception at 7 months have slower language development than those who show proficiency in native phonetic perception. This research supports the Native Language Magnet/Neural Commitment Theory originally proposed by Patricia K. Kuhl.

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Worked examples

Example 1 — a first encounter with Neuroscience of multilingualism

Start with the simplest possible case. Write down what Neuroscience of multilingualism claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Neuroscience of multilingualism before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Neuroscience of multilingualism ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Neuroscience of multilingualism

In research: Neuroscience of multilingualism appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Neuroscience of multilingualism in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Neuroscience of multilingualism is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bilingualism, Cognitive neuroscience, Neurology, so understanding it makes those chapters shorter.
In everyday life: Look for Neuroscience of multilingualism outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Neuroscience of multilingualism in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Neuroscience of multilingualism means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Neuroscience of multilingualism out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Neuroscience of multilingualism in simple terms?

Why does Neuroscience of multilingualism matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Neuroscience of multilingualism?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Neuroscience of multilingualism.