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Published on: September 27, 2010
Visual lateralization of pattern discrimination in the bottlenose dolphin (Tursiops truncatus)
L von Fersen1, U Schall, O Güntürkün
1Tiergarten Nürnberg, Germany.
Abstract:
The aim of the present study was to investigate whether bottlenose dolphins have cerebral asymmetries of visual processing. The monocular performance of the adult dolphin Goliath was tested using a large number of simultaneous multiple pattern discrimination tasks. The experiments revealed a clear right eye advantage in the acquisition and the retention of pattern discriminations as well as asymmetries in the interhemispheric transfer of visual information. As a result of a complete decussation at the optic nerve, this right eye superiority is probably related to a left hemisphere dominance in visual processing.
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