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The song changes the brain

The song changes the brain: from birds to humans

Christian Pulcinelli

Learning to sing, the birds alter the structure of your brain. And 'what emerges from a study of finches by researchers at Duke University in Durham (USA) published the latest issue of Nature.

In particular, the researchers studied some young songbirds who had listened to the first volta il canto di un uccello adulto. Analizzando con le tecniche di imaging la regione corticale del cervello legata alle abilità canore, si è visto che mentre apprendevano a cantare, avvenivano alcuni cambiamenti strutturali nelle spine dendritiche, le proiezioni delle cellule nervose dove avvengono le connessioni sinaptiche tra le cellule nervose stesse. Nelle prime 24 ore di apprendimento del canto, le spine dendritiche dei giovani fringuelli sono diventate più lunghe e più stabili. “Ci aspettavamo di vedere la costruzione di nuove spine e la perdita di quelle vecchie - ha dichiarato Richard Mooney, neurobiologo e coautore dello studio - invece ascoltare il canto di un adulto ha rapidamente stabilizzato le sinapsi in precedenza dinamiche”. I Researchers have also observed an increase of synaptic activity.

Previous studies had suggest a correlation between brain structural changes in sensory experience, but it was not known whether these same changes also accompany learning, as it seems to demonstrate this new research.

As suggested by the authors of the research, these findings could be extended to human and open new avenues of medicine. The hope, they say, is to help people regain language function after a traumatic event such as a stroke or damaged auditory nerves.

Moreover, new research, presented at the conference American Association for the Advancement of Science being held in San Diego, shows that due to hand people who have suffered a stroke may regain the floor. The brain areas involved in language are in fact other than those involved in singing. If the former were lead to damages, patients can learn to use their areas instead of singing.

source unità.it