San Francisco (ddp). When jazz musicians improvise, which is reflected in their brain activity: the responsible for the self-censorship reproduces, in which the own actions and the consequences of considered and evaluated are, is switched off while the region responsible for the representation of the self, however, developed a special activity. In this way, inhibitions are suppressed and the creativity run free left, have found Charles limb and Allen Braun of the Johns Hopkins University in Baltimore. The scientists reported their findings in the journal “PLoS one” (vol. 3, e1679). Limb and Brown recruited six jazz pianist who is declared ready to make music in a MRI (MRT) for the research project. With the help of this device, the researchers kept the brain activity of the musician of during normal playing from memory and during an improvisation. You pointed to the volunteers to four different tasks: first, the chimes played all to the beat of a metronome. Afterwards, they improvised to the same time with the notes of this scale. The third part all played a memorized Blues melody and least everyone improvised an own piece. The scientists then analyzed the images recorded by MRI of the brain and first saw the during of normal playing active regions of the brain. To get the creativity on the track, they withdrew then these of the recordings of the improvising brain. In this way, limb and Brown could isolate the unique for improvisation regions of the brain: with all musicians was to see that the activity in the so-called dorsolateral prefrontal cortex have significantly decreased. This area is very active for planned actions and self-censorship responsible and for example during a job interview. The medial prefrontal cortex, where self-expression and individual acts have their origin, however, showed a significantly increased activity. «We think that tells a story about themselves when improvising and shuts off all hindernden elements for it», limb summarizes the findings. The same mechanisms might be found not only in jazz musicians, but in all people, the researchers believe. An integral ability of people was spontaneously new thoughts to have to solve a problem, for example, off the cuff.