Music: Mirror Of The Mind

Brain activity was monitored through an electroencephalograph (EEG), which records electrical signals on the surface of the brain. The musical compositions were analyzed based on the melody, harmony, rhythm, pitch, and timber among other factors.

Researchers mapped brain activity and the compositions by regions of similarity punctuated by jumps where a significant change occurred. The data illustrated the similarity between patterns of electrical signals in the brain and of musical compositions.

In addition, the team determined a complexity index for the compositions and brain function, a number to describe the intricacy of either the musical patterns or electrical signals. The complexity indices for both patterns were less than two. This suggests that both the brain and the composition are self-organized, but in the case of the composition, it probably reflects the self-organized mind of the composer. The interpretation of the complexity index remains a question for further research.

In future experiments, researchers will monitor the brain activity of participants who are listening to music. This study will assess whether the complexity of a participant¿s brain activity is affected by the complexity of the composition. In addition, they will seek "fits" where the complexity of the music resembles the brain activity of the listener. If the physcists' hypothesis is correct, the fit between a composition and your brain activity helps determine your musical preferences.

Published in Physical Review E.