Brain mechanisms of jazz improvisation
Resumo
Musical improvisation, especially in jazz, is a unique form of creative process that requires active interaction between different brain networks. Unlike the performance of pre-learned musical parts, improvisation is characterized by the reduced functional connectivity between the central executive network (ECN) and the default mode network (DMN), allowing bottom-up processes to guide creative behavior. This phenomenon, known as hypofrontality, contributes to reduced cognitive control and facilitates spontaneous idea generation. The aim of this review is to investigate the neural mechanisms underlying musical improvisation. Findings have shown that cognitive control is reduced during improvisation, allowing musicians to generate new musical ideas with minimal interference from executive functions. At the same time, performing pre-learned music requires higher levels of cognitive appraisal and control, which is associated with higher functional connectivity of the ECN and DMN. Of particular interest was the finding that the same neural networks are activated during imaginative improvisation as during real performance, which emphasizes the importance of self-referential processes in creativity. The findings support the hypothesis that improvisation activates unique neural mechanisms that facilitate spontaneous creativity and the free flow of ideas.