The human brain is a network of approximately one hundred billion neurons. Different experiences create different neural connections which bring about different emotions. And depending on which neurons get stimulated, certain connections become stronger and more efficient, while others may become weaker. This is what’s called neuroplasticity.
Someone who trains to be a musician will create stronger neural connections that link the two hemispheres of the brain in order to be musically creative. Eventually every sort of skill or talent can be created.