Career details of the author: 1996-1999: assistant of Prof. G.J. Rieger at Hanover University 1999: PhD at Hanover University under supervision of Prof. Dr. G.J. Rieger 1999-2004: assistant of Prof. Dr. W. Schwarz and Prof. Dr. J. Wolfart at Frankfurt University 2004: Habilitation at Frankfurt University (venia legendi) 2004-today: âRamon y Cajalâ-investigador at Universidad Autonoma de Madrid (research fellow)