If we are talking about authors like Rabelais, Cervantes, Shakespeare, Dostoevsky, then all parts of the brain are necessary for genius creativity. If it is a question of modern authors, then, first of all, those parts of the brain that are responsible for the assiduity of the computer are needed.
“Why are we talking only about the causes hidden in the brain?”
Dear Vladimir,
You should not be surprised by this kind of talk by members of official biology. This biology breaks down the enormously complex and internally integrated whole of life processes into disconnected and isolated mechanical parts and undertakes causality based “scientific analysis” of the parts with the hope of adding them to the whole. But this is a hopeless process, because the sum of the parts is never equal to the integrated whole of life processes. Moreover, in an enormously complicated and dynamically integrated system, cause and effect interchange position; where a cause here and now becomes an effect there and then and vice versa!
This is the legacy of causality, determinism and mechanical materialism based biology going back to Cartesian Dualism and the “L’homme Machine” of de La Mettrie. This has been reinforced by the evolutionary biology of “Natural Selection” of Darwin and now by the “absolute determinists” and “no free will” neo-Darwinists like Richard Dawkins (a militant “atheist”!) who professes absolute determinism going back to the “Big Bang” creation theology!
Of course, the greatest official “philosopher - prophet” of modern natural "science", Karl Popper endorsed this “biology”: "Yet the doctrine that man is a machine was argued most forcefully in 1751, long before the theory of evolution became generally accepted, by de La Mettrie; and the theory of evolution gave the problem an even sharper edge, by suggesting there may be no clear distinction between living matter and dead matter. And, in spite of the victory of the new quantum theory, and the conversion of so many physicists to indeterminism de La Mettrie's doctrine that man is a machine has perhaps more defenders than before among physicists, biologists and philosophers; especially in the form of the thesis that man is a computer”. Popper, K.: 'Of Clouds and Clocks, included in Objective Knowledge', revised, 1978, p. 224.