Finnish researchers have developed a new method that makes it  possible to study how the brain processes various aspects of music such  as rhythm, tonality and timbre.
The study reveals how a variety of  networks in the brain, including areas responsible for motor actions,  emotions, and creativity, are activated when listening to music.
According  to the researchers, the new method will increase our understanding of  the complex dynamics of brain networks and the way music affects us.
 Responding to Argentinian tango
Using functional magnetic  resonance imaging (fMRI), the research team, led by Dr. Vinoo Alluri  from the University of Jyväskylä, Finland, recorded the brain responses  of individuals who were listening to a piece of modern Argentinian  tango.
"Our results show for the first time how different musical  features activate emotional, motor and creative areas of the brain",  says Professor Petri Toiviainen of the University of Jyväskylä, who was  also involved in the study.
Using sophisticated computer algorithms developed specifically for  this study, they then analysed the musical content of the tango, showing  how its rhythmic, tonal and timbral components evolve over time.
According  to Alluri, this is the first time such a study has been carried out  using real music instead of artificially constructed music-like sound  stimuli.
 The whole brain reacts to music
Comparing the brain responses  and the musical features led to an interesting new discovery: the  researchers found that listening to music activates not only the  auditory areas of the brain, but also employs large-scale neural  networks.
For instance, they discovered that the processing of  musical pulse activates motor areas in the brain, supporting the idea  that music and movement are closely intertwined.
Limbic areas of the brain, known to be associated with emotions, were found to be involved in rhythm and tonality processing.
 And the processing of timbre was associated with activations in the  so-called default mode network, which is assumed to be associated with  mind-wandering and creativity.
"We believe that our method  provides more reliable knowledge about music processing in the brain  than the more conventional methods," says Toiviainen.
He adds that  brain areas related to emotion and reward have in previous studies been  found to be activated during intensely pleasurable moments of music  listening. But this study, he says, is the first one to specify which  particular musical features activate these areas.
The study was recently published in the journal NeuroImage.
 
