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In particular, it is early music training that appears to most strengthen the connections between brain neurons and perhaps even leads to the establishment of new pathways. But research shows music training has more than a casual relationship to the long-term development of specific parts of the brain too.

In 1994 Discover magazine published an article which discussed research by Gottfried Schlaug, Herman Steinmetz and their colleagues at the University of Dusseldorf. The group compared magnetic resonance images (MRI) of the brains of 27 classically trained right-handed male piano or string players, with those of 27 right-handed male non-musicians.

Since then, a study by Dartmouth music psychologist Petr Janata published by Science in 2002, has confirmed that music prompts greater connectivity between the brains left and right hemisphere and between the areas responsible for emotion and memory, than does almost any other stimulus.

Janata led a team of scientists who reported some areas of the brain are 5% larger in expert musicians than they are in people with little or no musical training, and that the auditory cortex in professional musicians is 130% denser than in non-musicians. In fact, among musicians who began their musical studies in early childhood, the corpus callosum, a four-inch bundle of nerve fibers connecting the left and right sides of the brain, can be up to 15% larger.

While it is now clear from research studies that brain region connectivity and some types of spatial reasoning functionality is improved by music training, there is growing evidence that detailed and skilled motor movements are also enhanced.

Apparently the corpus callosum in musicians is essential for tasks such as finger coordination. Like a weight-lifter's biceps, this portion of the brain enlarges to accommodate the increased labour assigned to it.

In a study conducted by Dr. Timo Krings and reported in Neuroscience Letters in 2000, pianists and non-musicians of the same age and sex were required to perform complex sequences of finger movements. The non-musicians were able to make the movements as correctly as the pianists, but less activity was detected in the pianists' brains. The scientists concluded that compared to non-musicians, the brains of pianists are more efficient at making skilled movements.

The study of music definitely affects the human brain and its development, in a staggering number of ways. But what to make of all the research, especially in terms of deciding the best course of music study or appreciation for yourself or your offspring?

A 2000 article by N M Weinberger in MuSICA Research Notes makes the following excellent point: Although the Mozart Effect may not list up to the unjustified hopes of the public, it has brought widespread interest in music research to the public. And listening to ten minutes of Mozart could get someone interested in listening to more unfamiliar music, opening up new vistas.

Irregardless of the hype surrounding the Mozart Effect, the overall academic evidence for music study as a tool to aid brain development, is compelling.

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