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The Head-Neck Sensory Motor System$
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Alain Berthoz, Werner Graf, and P. P. Vidal

Print publication date: 1992

Print ISBN-13: 9780195068207

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195068207.001.0001

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Stabilizing Head/Eye Movements in the Blowfly Calliphora erythrocephala

Stabilizing Head/Eye Movements in the Blowfly Calliphora erythrocephala

(p.49) Chapter 5 Stabilizing Head/Eye Movements in the Blowfly Calliphora erythrocephala
The Head-Neck Sensory Motor System

Roland Hengstenberg

Oxford University Press

Like the majority of other insects, the blowfly has five eyes: three ocelli on top of the head and two compound eyes at the side. The ocelli retinae compose a few hundred photoreceptors whose light-sensitive structures lie inside the focal distance of the lens. Ocelli are believed to act as wide field brightness sensors and are not suited to perceive fine spatial details. Degradation of visual perception by blurring during self-motion is principally the same in all types of eyes. The transfer of high spatial frequencies can be optimized by minimization of the retinal slip, using the necessary compensatory eye movements.

Keywords:   blowfly, ocelli, ocelli retinae, brightness sensors, retinal slip

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