Neural Substrates of Spontaneous Musical Performance: An fMRI Study of Jazz Improvisation

TLDR

The study examined neural substrates of spontaneous musical performance in professional jazz pianists using fMRI, comparing improvisation to over‑learned sequences across two paradigms of differing complexity. Functional MRI was employed to measure prefrontal, sensorimotor, and limbic activity during improvisation versus over‑learned performance, revealing dissociated patterns of activation and deactivation. Improvisation was marked by deactivation of dorsolateral prefrontal and lateral orbital regions, activation of medial prefrontal cortex, widespread sensorimotor activation, and limbic deactivation, suggesting a neural context that supports spontaneous creative behavior.

Abstract

To investigate the neural substrates that underlie spontaneous musical performance, we examined improvisation in professional jazz pianists using functional MRI. By employing two paradigms that differed widely in musical complexity, we found that improvisation (compared to production of over-learned musical sequences) was consistently characterized by a dissociated pattern of activity in the prefrontal cortex: extensive deactivation of dorsolateral prefrontal and lateral orbital regions with focal activation of the medial prefrontal (frontal polar) cortex. Such a pattern may reflect a combination of psychological processes required for spontaneous improvisation, in which internally motivated, stimulus-independent behaviors unfold in the absence of central processes that typically mediate self-monitoring and conscious volitional control of ongoing performance. Changes in prefrontal activity during improvisation were accompanied by widespread activation of neocortical sensorimotor areas (that mediate the organization and execution of musical performance) as well as deactivation of limbic structures (that regulate motivation and emotional tone). This distributed neural pattern may provide a cognitive context that enables the emergence of spontaneous creative activity.