Zusammenfassung
Visuell gesteuerte Orientierung (räumliche Lokalisation) und visuelles Unterscheidungsvermögen beim Goldhamster werden durch Hirnläsionen funktionell getrennt. Nach Entfernung der Sehrinde können die Tiere keine visuellen Musterunterscheidungen, wohl aber noch in fast normaler Weise visuelle Objektlokalisationen vornehmen. Entfernung des Colliculus superior führt zu entgegengesetzten Effekten: die Tiere können sich nicht mehr nach der Position eines visuellen Reizes orientieren, zeigen aber trotzdem ausgezeichnete Musterunterscheidung.
Summary
Visually-guided orientation (spatial localization) and visual discrimination were dissociated by means of brain lesions in the golden hamster. After ablation of visual cortex, hamsters failed to discriminate visual patterns, but showed nearly normal ability to localize an object in space by means of vision. Ablation of the superior colliculus produced opposite effects: these animals were completely unable to orient to the position of a visual stimulus, but nevertheless showed excellent pattern discrimination.
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During the period of the reported research, the author was supported by a U.S. Public Health Service predoctoral fellowship. Additional support was received from the National Institute of General Medical Sciences under their Training Grant STl GM 1064-04 BHS.
For a more detailed report of this work, and reports of further experiments, see Schneider (1966).
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Schneider, G.E. Contrasting visuomotor functions of tectum and cortex in the golden hamster. Psychol. Forsch. 31, 52–62 (1967). https://doi.org/10.1007/BF00422386
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DOI: https://doi.org/10.1007/BF00422386