Eye movements of laterally eyed birds are not independent

Voß J, Bischof H-J (2009)
JOURNAL OF EXPERIMENTAL BIOLOGY 212(10): 1568-1575.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Most birds have laterally placed eyes with two largely separated visual fields. According to studies in pigeons laterally eyed birds move their eyes independently in most situations, eye coordination just occurred during converging saccades towards frontal stimuli. Here we demonstrate for the first time that laterally eyed zebra finches show coordinated eye movements, regarding direction and amplitude. Spontaneous and visually elicited movements of the two eyes were recorded simultaneously, using a newly developed eye tracking system. We found that, if one eye moves in a certain direction, the other eye simultaneously performs a counter-movement in the opposite direction. Based on these data we developed a hypothesis of how laterally eyed birds cope with the situation in which the left and right eye simultaneously obtain images with different content. We suggest that the counter-movements maintain the spatial relationship of the two visual fields. 'Oculospatial constancy', as we call it, facilitates the combination of the left and right visual percept on the level of peripheral or unattended viewing, and the localization of appearing stimuli within the whole visual field. As soon as two visual stimuli simultaneously appear in the left and right visual field, the birds decide on one stimulus and direct the fovea of the appropriate eye towards it for high resolution analysis, the other eye simultaneously performing a counter-saccade. This leads to the assumption that, in contrast to simultaneous peripheral perception with two eyes, the processing of foveal information is possible only for one eye at one time.
Stichworte
vision; birds; eye tracking; oculospatial constancy; eye coordination
Erscheinungsjahr
2009
Zeitschriftentitel
JOURNAL OF EXPERIMENTAL BIOLOGY
Band
212
Ausgabe
10
Seite(n)
1568-1575
ISSN
0022-0949
eISSN
1477-9145
Page URI
https://pub.uni-bielefeld.de/record/1634058

Zitieren

Voß J, Bischof H-J. Eye movements of laterally eyed birds are not independent. JOURNAL OF EXPERIMENTAL BIOLOGY. 2009;212(10):1568-1575.
Voß, J., & Bischof, H. - J. (2009). Eye movements of laterally eyed birds are not independent. JOURNAL OF EXPERIMENTAL BIOLOGY, 212(10), 1568-1575. doi:10.1242/jeb.024950
Voß, J., and Bischof, H. - J. (2009). Eye movements of laterally eyed birds are not independent. JOURNAL OF EXPERIMENTAL BIOLOGY 212, 1568-1575.
Voß, J., & Bischof, H.-J., 2009. Eye movements of laterally eyed birds are not independent. JOURNAL OF EXPERIMENTAL BIOLOGY, 212(10), p 1568-1575.
J. Voß and H.-J. Bischof, “Eye movements of laterally eyed birds are not independent”, JOURNAL OF EXPERIMENTAL BIOLOGY, vol. 212, 2009, pp. 1568-1575.
Voß, J., Bischof, H.-J.: Eye movements of laterally eyed birds are not independent. JOURNAL OF EXPERIMENTAL BIOLOGY. 212, 1568-1575 (2009).
Voß, Joachim, and Bischof, Hans-Joachim. “Eye movements of laterally eyed birds are not independent”. JOURNAL OF EXPERIMENTAL BIOLOGY 212.10 (2009): 1568-1575.

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