期刊
EUROPEAN JOURNAL OF NEUROSCIENCE
卷 20, 期 7, 页码 1937-1944出版社
BLACKWELL PUBLISHING LTD
DOI: 10.1111/j.1460-9568.2004.03654.x
关键词
birds; Columba livia; geometric module; hippocampus; spatial learning
The geometric properties of bounded space have attracted considerable attention as a source of spatial information that can guide goal navigation. Although the use of geometric information to navigate has been observed in every species studied to date, the neural mechanisms that support the representation of geometric information are still debated. With the purpose of investigating this topic, we trained pigeons with lesion to the hippocampal formation to search for food in a rectangular-shaped arena containing one wall of a different color that served as the only distinctive environmental feature. Although lesioned pigeons learned the task even faster than control animals, probe trials showed that they were insensitive to geometric information. Control animals could encode and use both geometric and feature information to locate the goal. By contrast, lesioned pigeons relied exclusively on the feature information provided by the wall of a different color. The results indicate that the avian hippocampal formation is critical for learning the geometric properties of space in homing pigeons.
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