Researchers in voice, speech, and language studied the brain activity of freestyling rappers using functional magnetic resonance imaging (fMRIs). Their findings may provide a key insight into human improvisational creativity.
The findings showed that freestyling changes activity in the prefrontal cortex, the brain region associated with language and decision-making. The improvisation increases activity in the area responsible for thought and action but decreases it in the parts that control and suppress. The findings suggest that the flowing, freestyling brain can relax its neural constraints to allow freer oral expression of words and ideas.
Read more at National Geographic.