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A pathway in the brain that allows humans to learn new words

RATE THIS! +19
Posted in Science on 25th Jul, 2013 10:17 PM by AlexMuller

Researchers from King’s College London Institute of Psychiatry, in collaboration with Bellvitge Biomedical Research Institute (IDIBELL) and the University of Barcelona, have mapped the neural pathways involved in word learning among humans.

 

They found that the arcuate fasciculus, a collection of nerve fibers connecting auditory regions at the temporal lobe with the motor area located at the frontal lobe in the left hemisphere of the brain, allows the “sound” of a word to be connected to the regions responsible for its articulation.

 

The average adult’s vocabulary consists of about 30,000 words. This ability seems unique to humans; the species closest to us — chimps — manage to learn no more than 100.

 

Differences in the development of these auditory-motor connections may explain differences in people’s ability to learn words. The results of the study are published in the journal Proceedings of the National Academy of Sciences (PNAS).

 

Dr. Marco Catani, co-author from King’s College London Institute of Psychiatry said: “This research sheds new light on the unique ability of humans to learn a language, as this pathway is not present in other species.

 

“The implications of our findings could be wide-ranging — from how language is taught in schools and rehabilitation from injury, to early detection of language disorders such as dyslexia. In addition these findings could have implications for other disorders where language is affected, such as autism and schizophrenia.”

 

Myelin covering of connecting fibers speeds word learning. The study involved 27 healthy volunteers. Researchers used diffusion tensor imaging to image the structure of the brain before a word learning task and functional MRI, to detect the regions in the brain that were most active during the task.

 

They found a strong relationship between the ability to remember words and the structure of arcuate fasciculus, which connects two brain areas: the territory of Wernicke, related to auditory language decoding, and Broca’s area, which coordinates the movements associated with speech and the language processing.



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Comments

Author: Guest
Posted: 2013-07-26
+4
Congratulations to this teams at the King’s College London Institute of Psychiatry, in collaboration with Bellvitge Biomedical Research Institute (IDIBELL) and the University of Barcelona, if this study could help people especially those with trauma damage be able to speak again, then this study is well worth it. Reply
Author: Guest
Posted: 2013-09-06
+0
QxciCe Thank you for your post.Really looking forward to read more. Cool. Reply
Author: Guest
Posted: 2013-10-16
+0
Js1UiG Im obliged for the blog article.Really thank you! Will read on... Reply


 

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