From Guitar Player:
Whether it’s playing “Stairway to Heaven” until your fingers bleed or always finding yourself in the center of a group of people intent on singing “Wagon Wheel,” some things are common to all guitarists.
Including, as it turns out, their brain chemistry.
For starters, guitarists literally have the ability to synchronize their brains while playing. In a 2012 study in Berlin, researchers had 12 pairs of guitarists play the same piece of music while having their brains scanned. They discovered that the guitarists’ neural networks would synchronize not only during the piece, but even slightly before playing. So, basically, guitarists can read each others’ minds better than they can read music.
That synch happens in the areas of the brain that deal with music production and social cognition, so it makes a real difference in how tight a band sounds. When people talk about a band’s chemistry, this may well be what they’re seeing. It also explains why brothers are the core duo in so many famous rock bands.
But part of this ability to synchronize actually comes from one overarching truth about guitarists: they’re more intuitive than most.