de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Optical properties of the ocelli of Calliphora erythrocephala and their role in the dorsal light response.

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83962

Hengstenberg,  R
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Schuppe, H., & Hengstenberg, R. (1993). Optical properties of the ocelli of Calliphora erythrocephala and their role in the dorsal light response. J. Comp. Physiol. A, 173, 143-149.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-EDB4-B
Abstract
The 3 Ocelli of the blowfly Calliphora erythrocephala, grouped close together on the top of the head (Fig.1), have large, extensively overlapping visual fields. Together they view the entire upper hemisphere of the surroundings plus part of the lower hemisphere (Fig. 5, 7). It is shown for the lateral ocelli that despite the underfocussing of the ocellar lens large patterns are imaged on the receptor mosaic. Because of the astigmatism of the lens, patterns in longitudinal orientations are more accurately represented than in others (Fig. 3). Nevertheless, an artifical horizon rotated around the long axis of the animal does not elicit head roll. Likewise, changes of overall brightness in the visual field of the median and one lateral ocellus elicit only weak phasic-tonic "dorsal light responses" of the animal which supplement the tonic dorsal light responses mediated by the compound eyes (Figs. 9, 10). Our results show that, in Calliphora, the ocelli have little influence on head orientation during flight, and must be assumed to serve other functions.