Music Molds The Brain

Interesting:

All those hours practicing the piano pay off big time by biologically enhancing a person's ability to quickly recognize and mentally process sounds that carry emotion, according to a new study.

The study, from Northwestern University in Evanston, Ill., offers a new line of evidence that the brain we end up with is not necessarily the same brain we started out with.

...Kraus and a team of researchers attached electrodes to the heads of 30 people, half of whom were serious musicians and half of whom had no significant musical training. The electrodes measure electricity, "which is, of course, the currency of the nervous system," Kraus said. The study revealed two major differences between the musicians and the nonmusicians.

Musicians heard an emotion-packed, complex sound with an enhanced sensitivity, and they also were less distracted by simple sounds, according to the study, published in the current issue of the European Journal of Neuroscience.

"What we found in this study is both an enhancement and an economy of resources varies as a function of the extent of musical experience," Kraus said. "The more years the person has been playing an instrument, and the earlier the person began musical training, the larger the effect."

Although many other studies have tried to show the beneficial effects of musical training, the researchers said their findings "provide the first biological evidence for behavioral observations indicating that musical training enhances the perception of vocally expressed emotion." The findings have implications far beyond the world of music.

"The same neural transcription process that is enhanced in musicians is found to be deficient in some children with language disorders such as dyslexia and autism," Kraus noted.

The research suggests that something as basic as musical training may be a useful therapeutic device, along with other more traditional techniques.

...The researchers relied on an emotion-packed sound that has been used for many years by scientists around the world who have studied auditory processes -- the sound of an infant crying. That sound carries an enormous emotional load, but it is also a surprisingly complex sound.

...As expected, the musicians had an enhanced ability to pick up on the emotional cues of the sound. But the researchers were a little surprised to learn that the musicians were more attuned to the complex sounds -- those carrying the most emotion -- than to the less significant "periodic" sounds of crying. That allowed them to devote more resources to the important sounds and virtually ignore the sounds that carried little emotion.

...The findings might seem open to the chicken-and-egg debate. Did the musicians perform better because they are naturally more sensitive to sounds, and thus more likely to study music? Or did their nervous systems change because they were exposed to music for more than a decade?

The researchers feel confident the correct answer is the latter.

"With musician studies you always wonder if the person was just born with a more accurate sensor," Kraus said. "And there's probably an element of that. We're all a combination of nature and nurture."

But the fact that all the musicians performed so much better than the nonmusicians clearly shows that the study of music -- not an innate musical aptitude -- literally changed the way the musicians' brains processed sounds, the researchers concluded.

...In other words, we aren't just who we are. We're also what we have done.