While there are many ways it can be implemented, creativity serves to enhance and innovate upon the established norm. In a way, every invention, composition, or scientific breakthrough can be traced back to a single point of inspiration, or a single moment of desire to push past a commonly accepted boundary and venture into unknown territory. Yet, for all its influence, we largely don’t understand exactly how creativity has changed us.

The process of quantifying creativity is still arbitrary and heavily influenced by subjectivity. To this end, researchers at the Center for Music in the Brain at Aarhus University in Denmark have recently applied objectivity to rating musical creativity. Additionally, improvisation, a form of expressed creativity in music, is common across many disciplines worldwide: Baroque , Chinese Traditional , Griot, Carnatic, and Jazz, to name a few. The researchers focused on Jazz music due to its implementation of structured creativity, which, as opposed to free creativity, fits within the bounds of the musical style while allowing for individual improvisations.

The research team used both resting-state and task-based functional MRI (fMRI) to better understand how creativity physically affects the brain in real time. After asking participants to perform musical tasks with improvisational elements, the researchers found that the brain doesn't have a binary on-off switch for creativity. Instead, it continuously shifts which regions of the brain and networks are most active, depending on how much freedom the musician gives themselves.

When improvisation was structured and melody-guided, the brain relied on regions involved in deliberate decision-making and monitoring those changes. In contrast, when musicians were given more freedom to play spontaneously, activity surged in areas tied to hearing, movement, and pleasure. At the highest levels of creative freedom, the brain cast an even wider net of regions — including those involved in language, complex behavior, and motor control — all firing in connected harmony. Additionally, prior research has confirmed neuroplastic changes in both anatomical structure and functional connectivity as a direct result of musical performance. In short, the brain physically reshapes itself around the creative demands placed upon it.

The Center for Music in the Brain’s discoveries reach far beyond the jazz discipline, and perhaps even music. Creativity, long treated as an intangible and individualistic pursuit (and therefore separate from the more rigid sciences), leaves a measurable imprint on the brain's architecture. The act of improvising and pushing past the established norm produces structural and functional change akin to training a muscle to be better prepared for its own use. In this sense, anyone who incorporates creativity through improvisation can rewire themselves to be better suited for future creative endeavors.