"You have two brains: a left and a right. Modern brain scientists now know that your left brain is your verbal and rational brain; it thinks serially and reduces its thoughts to numbers, letters and words… Your right brain is your nonverbal and intuitive brain; it thinks in patterns, or pictures, composed of ‘whole things,’ and does not comprehend reductions, either numbers, letters, or words."
From; The Fabric of Mind, by the eminent scientist and neurosurgeon, Richard Bergland. Viking Penguin, Inc., New York 1985. pg.1
Betty Edwards invented Drawing on the Right Side of the Brain. She thought up terms like: L-en R-modus modus... Read about it in the pretext of her book.