Effect of bilingualism on ageing and the brain

The context for examining how bilingualism affects cognitive ability is functional neuroplasticity, the study of how experience modifies brain structure and brain function. Guo, Liu, Misra, and Kroll [ 65 ] used functional magnetic resonance imaging fMRI to demonstrate the recruitment of different systems for each of global inhibition dorsal left frontal gyrus and parietal cortex and local inhibition dorsal anterior cingulate cortex, supplementary motor area in a sample of Chinese-English bilinguals, and validated their distinct roles in bilingual language control.

In contrast to this pattern, bilinguals at all ages demonstrate better executive control than monolinguals matched in age and other background factors. Both processes are required for fluent language selection but the two are carried out differently.

The cognitive control required to manage multiple languages appears to have broad effects on neurological function, fine-tuning both cognitive control mechanisms and sensory processes. This research paves the way for future causal studies of bilingualism and cognitive decline prevention.

We discuss recent evidence that bilingualism is associated with a delay in the onset of symptoms of dementia. Additional evidence against the increase of FA values as a result of late bilingualism has been provided by Cummine and Boliek 24who tested 13 late bilingual Chinese—English speakers and 13 monolingual English speakers.

The authors hope that future prospective longitudinal studies in this area will use objective measures of bilingualism, separate sociocultural factors influencing language proficiency and use, and use formal diagnostic criteria to identify dementia.

The improvements in cognitive and sensory processing driven by bilingual experience may help a bilingual person to better process information in the environment, leading to a clearer signal for learning. The connectivity was stronger in the frontal-temporal coupling than in the reverse direction.

Bilingualism boosts the brain at all ages

This article focuses on the effects of bilingualism on the structure and integrity of the white matter WM of the brain and the factors that have been shown to affect it.

Europe and the United States are not alone, either. And for many people, this rich linguistic environment involves not just one language but two or more.

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On picture-naming tasks, bilingual participants are slower [ 25 — 28 ] and less accurate [ 2930 ] than monolinguals. Bilinguals produced smaller Simon effects than monolinguals at all ages.

In many countries that percentage is even higher—for instance, 99 percent of Luxembourgers and 95 percent of Latvians speak more than one language.

Findings indicate that those who spoke two or more languages had significantly better cognitive abilities compared to what would be expected from their baseline. So what do these findings say about the conflicting results from previous studies?

Third, prolonged practice reduced both the Simon effect and the size of the bilingual advantage. Halfway through the study, the puppet began appearing on the opposite side of the screen.

We interpreted these effects as additions respectively to the intercept and slope of the predicted relationship between cognition at age 70 years and CI Fig. The effects were present in those who acquired their second language early as well as late.

In this review, we examine the evidence for bilingual advantages in executive control and explore the possible mechanisms and neural correlates that may help to explain them.

We are surrounded by language during nearly every waking moment of our lives. This advantage has been shown to extend into older age and protect against cognitive decline [ 254445 ], a point we return to below.

Because high FA values have been related to greater WM integrity 6Luk and colleagues suggested that lifelong bilingual experience preserves the WM integrity in older adults.

Schlegel and colleagues interpreted these findings as evidence for the structural plasticity that underlies language learning, which can be explained as increased myelination across the tracts under investigation.

Most of the participants were undergraduate students and were not immigrants, so the two groups were well equated apart from the language difference. However, monolinguals and bilinguals might have different baseline cognitive ability.

The effects of bilingualism on the white matter structure of the brain

Three other results from this study are noteworthy. Abutalebi and colleagues [ 93 ] extended this finding to show activation of ACC for both language switching and nonverbal switching. The ability to ignore competing perceptual information and focus on the relevant aspects of the input is called inhibitory control.

Nakamura and colleagues [ 96 ] interpreted the results as indicating top-down control from left IFG to left MTG in a bilingual context. The participants took an intelligence test in at age 11 years, and were retested in — This permitted us to investigate the effects of bilingualism in mature adult brains that are not otherwise affected structurally by either normal development 11 or aging 5.

Learning second language 'slows brain ageing'

The affected areas are illustrated in Fig.“Bilingualism serves as enrichment for the brain and has real consequences when it comes to executive function, specifically attention and working memory,” Kraus says.

The team next plans to explore whether learning a language later in life can bring similar benefits. PDF | On Jul 3,Brian T. Gold and others published Executive Control, Brain Aging and Bilingualism.

understanding of the functional and structural neural mechanisms underlying bilingualism-induced cognitive mint-body.com this perspective we discuss and integrate recent cognitive andneuroimagingworkonbilingualadvantage, andsuggestanaccountthatlinkscognitive control, cognitive reserve, and brain reserve in bilingual aging and memory.

New research reveals that bilingualism has a positive effect on cognition later in life. Findings published in Annals of Neurology, a journal of the American Neurological Association and Child Neurology Society, show that individuals who speak two or more languages, even those who acquired the.

She came to the program fully expecting to study the extent to which her bilingual brain was adapted to succeed. “I had the impression that there’s a really strong effect of bilingualism on executive function,” de Bruin told me recently. Then, she carried out her first study.

Recent evidence suggests a positive impact of bilingualism on cognition, including later onset of dementia. However, monolinguals and bilinguals might have different baseline cognitive ability. We present the first study examining the effect of bilingualism on later-life cognition controlling for.

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Effect of bilingualism on ageing and the brain
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