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  Development of the horizontal optocollic reflex in juvenile barn owls (Tyto furcata pratincola)

Wagner, H., Pappe, I., Brill, S., & Nalbach, H.-O. (2022). Development of the horizontal optocollic reflex in juvenile barn owls (Tyto furcata pratincola). Journal of Comparative Physiology A: Neuroethology Sensory Neural and Behavioral Physiology, 208(4), 479-492. doi:10.1007/s00359-022-01555-0.

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Wagner, H1, Author           
Pappe, I1, Author           
Brill, S, Author
Nalbach, H-O1, Author           
Affiliations:
1Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497800              

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 Abstract: Adult barn owls and primates possess an almost symmetric monocular rotational horizontal optocollic reflex. In primates, the reflex is initially asymmetric and becomes symmetric with time after birth. The condition in barn owls has not been studied so far. Here, we present data on the development of this reflex in this bird. We tested juvenile barn owls from the time before they open their eyes after hatching to the time they reach adult feather length. Wide-field visual patterns served as stimuli. They were presented at different rotational speeds in binocular and monocular settings. The binocular horizontal optocollic responses of juvenile barn owls were symmetric and adult-like on the first day that the birds responded to the stimulus. The monocular responses showed different rates of development in respect to stimulus velocity and stimulus direction. For velocities up to 20 deg/s, the monocular reflex was also adult-like on the first day that the birds responded to the stimulus. An initially higher asymmetry for 30 deg/s compared to adults disappeared within about two weeks. The development at even higher velocities remained unclear.

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 Dates: 2022-062022-07
 Publication Status: Published in print
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 Identifiers: DOI: 10.1007/s00359-022-01555-0
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Title: Journal of Comparative Physiology A: Neuroethology Sensory Neural and Behavioral Physiology
  Other : J. Comp. Physiol. A -Neuroethol. Sens. Neural Behav. Physiol.
Source Genre: Journal
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Publ. Info: Heidelberg : Springer Verlag
Pages: - Volume / Issue: 208 (4) Sequence Number: - Start / End Page: 479 - 492 Identifier: ISSN: 0340-7594
CoNE: https://pure.mpg.de/cone/journals/resource/954925519626