xxxxxxxxxxxxxxxxxxxxxxxxxxixxxxxxxxxxxxxxxBert & co-worker / medewerker

xxixxxxxxA lecturetontsystemsttheory:tdemonstrationtoftthetregulationtoftthetpositiontoftthetheadtintthreedimensionalispace.
xxxxxxxixxxCollegetsysteemleer:tdemonstratietvantdetregelingtvantdetpositietvantdetkoptintdetdriedimensionaletruimte

xxxxxxxxxxxxxxxxxxxxCartoon: Almanak 1988, Leiden, Medische Faculteit der Leidse Studenten (MFLS)