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Effects of Bilingualism on the Brain

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Submitted By camilaoliveira
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Did you know that being proficient in more than one language could help a person focus? Neuroscience has been able to show that learning more than one language can give a person various advantages over people who are only proficient in one language. Studies have shown that people who are proficient in a second language have an increased amount of gray matter in specific areas of the brain associated with language and communication skills (Mechelli, et al., 2004). The brain is made up of white and gray matter, two types of tissues that are visible to the human eye. White matter is made up of fibers that function to facilitate communication between the body and gray matter. White matter gets its name from the myelin, a white, fatty substance that acts as an insulator, surrounding each axon. Gray matter is made up of cell bodies which function to send sensory and motor information to the Central Nervous System to create a response to a stimulus.
Research and experiments done by a group of scientists test the density of gray matter in different individuals. Their experiment was conducted on eighty three people: twenty five were monolinguals, twenty five became bilingual at an early age, and thirty three became bilingual between the ages of ten and fifteen and have practiced the language regularly for at least five years. The scientists used voxel-based morphometry to record the differences between the brains of each individual. A voxel is a three-dimensional equivalent to a pixel, and voxel-based morphometry is a brain imaging technique that examines each voxel to find differences in volume. These tests showed that gray matter density in the inferior parietal cortex was greater in bilinguals than monolinguals. The tests also reveal that proficiency in a second language is associated with gray matter density in the same region of the brain. Their experiment drew two

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