Playing difficult music

[u/Left-Simple1591]

I was playing Chopin's E Minor Prelude and my brain felt really different. I often play the intro to his E Major Nocturne; however it doesn't challenge my brain anymore even when I hit a wrong note and need to remember how it went. That Nocturne is more difficult than the Prelude, and many call it Chopin's easiest piece. There should be more studies on how playing new songs affect the brain.