Certain human behaviours, especially actions like the finger movements in musical performances, are very complex and require many interconnected neural networks where information can be transmitted across multiple brain regions. It has been found that there are often functional differences in the brains of professional musicians, when compared to other individuals. This is thought to reflect the musician's innate ability, which may be fostered by an early exposure to musical training. An example of this is bimanual synchronized finger movements, which play an essential role in piano playing. It is suggested that bimanual coordination can come only from years of bimanual training, where such actions become adaptations of the motor areas. When comparing professional musicians to a control group in complex bimanual movements, professionals are found to use an extensive motor network much less than those non-professionals. This is because professionals rely on a motor system that has increased efficiency, and, therefore, those less trained have a network that is more strongly activated. It is implied that the untrained pianists have to invest more neuronal activity to have the same level of performance that is achieved by professionals. This, yet again, is said to be a consequence of many years of motor training and experience that helps form a fine motor memory skill of musical performance.