Stereoscopic depth perception in the owl
作者:
Robert Willigen,
Barrie Frost,
Hermann Wagner,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 6
页码: 1233-1237
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Animal behavior;Binocular disparity;Neuroethology;Stereopsis;Visual psychophysics
数据来源: OVID
摘要:
IT is unclear whether the neural algorithm that underlies stereoscopic vision in birds incorporates both low level (camouflage breaking) and high level (depth ordering) comparisons of information available to each of the eyes. Both visual functions were successfully tested by examining transitive inference performance in two barn owls trained to discriminate static Julesz random dot stereograms, thus demonstrating a capacity to detect relative depth using fine retinal disparity as the sole cue for discrimination. Our behavioral tests provide strong evidence that the barn owl possesses global stereopsis comparable to that found in the macaque monkey - the owl's best stereoacuity was 2 min of arc.
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