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Titolo:
Neuronal processing of behaviourally generated optic flow: experiments andmodel simulations
Autore:
Kern, R; Lutterklas, M; Petereit, C; Lindemann, JP; Egelhaaf, M;
Indirizzi:
Univ Bielefeld, Fak Biol, Lehrstuhl Neurobiol, D-33501 Bielefeld, Germany Univ Bielefeld Bielefeld Germany D-33501 iol, D-33501 Bielefeld, Germany
Titolo Testata:
NETWORK-COMPUTATION IN NEURAL SYSTEMS
fascicolo: 3, volume: 12, anno: 2001,
pagine: 351 - 369
SICI:
0954-898X(200108)12:3<351:NPOBGO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION-SENSITIVE INTERNEURONS; FREQUENCY SELECTIVITY; EXTRASTRIATE CORTEX; VISUAL INTERNEURONS; MOVEMENT DETECTORS; SPATIAL-FREQUENCY; OPTOMOTOR SYSTEM; HORIZONTAL CELLS; GAIN-CONTROL; NEURAL CODE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Kern, R Univ Bielefeld, Fak Biol, Lehrstuhl Neurobiol, Postfach 100131, D-33501 Bielefeld, Germany Univ Bielefeld Postfach 100131 Bielefeld Germany D-33501 Germany
Citazione:
R. Kern et al., "Neuronal processing of behaviourally generated optic flow: experiments andmodel simulations", NETWORK-COM, 12(3), 2001, pp. 351-369

Abstract

The stimuli traditionally used for analysing visual information processingare much simpler than what an animal sees when moving in its natural environment. Therefore, we analysed in a previous study the performance of an identified neuron in the optomotor system of the fly by using as visual stimuli image sequences that were experienced by the animal while walking in a structured environment. These electrophysiological experiments revealed thatthe fly visual system computes from behaviourally generated optic flow a rather unambiguous representation of the animal's self-motion. In contrast to conclusions based on simple stimuli, the directions of turns are represented by an interneuron, the HSE cell, quite independent of the spatial layout of the environment and its textural properties when the cell is stimulated with behaviourally generated optic flow. This conclusion is substantiatedhere by further experimental evidence. Moreover, it is shown that the largely unambiguous responses of the HSE cell to behaviourally generated optic flow can be replicated to a large extent by a network model of the fly's visual motion pathway. These results stress the significance of naturalistic stimuli for analysing what is encoded by neuronal circuits under natural operating conditions.

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Documento generato il 21/01/20 alle ore 07:34:44