To add a little perspective as to how this whole 'left-right brain' myth has been perpetuated - a lot of it has come to popular consciousness (and particularly

To add a little perspective as to how this whole 'left-right brain' myth has been perpetuated - a lot of it has come to popular consciousness (and particularly that of artists) through the (learn to draw) book "drawing on the right side of the brain" by Betty Edwards (1979). Its actually a fantastic book for its purpose. It remains today a classic book still widely used - better than even most more recent books on the same topic. Whilst its use of the 'left-right' thing is obviously fundamentally flawed scientifically, in the book it is more or less a model presented to the reader in describing how to 'think' to aid in drawing - which mental processes to turn on/off, focus on or ignore. This more practical side of the book has proved very helpful and effective to its readers and is the real achievement which has led to the book's enduring success. The success of this has however led to the propagation of the 'left-right' thing which the book does basically claim is a scientific basis for everything described. My only point in saying this is that there's complexity to stories like this - ideas can be helpful even if the scientific base they pretend to be based on is incorrect.