Cognitive NeuroscienceAsymmetries of representation in the visual system of pigeonsGùntùkùn, Onur1,3; Hellmann, Burkhard1; Melsbach, Gudrun2; Prior, Helmut1Author Information 1AE Biopsychologie, Fakultà fúr Psychologie, Ruhr-Universitàt Bochum, D-44780 Bochum 2Allgemeine Psychologie, Sozialwissenschaftliche Fakultàt, Universitàt Konstanz, D-78457 Konstanz, Germany. 3Corresponding Author: Onur Gùntùkùn ACKNOWLEDGEMENTS: We thank Ariane Schwarz for excellent technical assistance. Supported by grants from the Deutsche Forschungsgemeinschaft (SFB Neurovision) and the Alfried Krupp-Stiftung. Received 23 September 1998; accepted 5 October 1998 NeuroReport: December 21st, 1998 - Volume 9 - Issue 18 - p 4127-4130 Buy Abstract ALTHOUGH functional asymmetries in the course of visual information processing have been known for a long time in humans as well as in non-human species, the structural basis of these asymmetries is largely unknown. We now report that due to an asymmetry of commissural projections in the pigeon the left nucleus rotundus of the ascending tectofugal visual system predominantly represents inputs from both eyes while the right nucleus rotundus mainly represents the contralateral left eye. We suggest that a comparable organization exists for several asymmetries in humans. A representation of both hemifields can provide the dominant hemisphere with direct access to all stimulus features when objects cross the vertical meridian. © 1998 Lippincott Williams & Wilkins, Inc.