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Titolo:
Optic flow representation in the optic lobes of Diptera: modeling innervation matrices onto collators and their evolutionary implications
Autore:
Douglass, JK; Strausfeld, NJ;
Indirizzi:
Univ Arizona, Arizona Res Labs, Div Neurobiol, Tucson, AZ 85721 USA Univ Arizona Tucson AZ USA 85721 abs, Div Neurobiol, Tucson, AZ 85721 USA
Titolo Testata:
JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
fascicolo: 9, volume: 186, anno: 2000,
pagine: 799 - 811
SICI:
0340-7594(200009)186:9<799:OFRITO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL-MOTION-DETECTION; CERCAL SENSORY-SYSTEM; DETECTION CIRCUITS; LOBULA PLATE; CALLIPHORA-ERYTHROCEPHALA; ELECTRIC FISH; INTERNEURONS; FLIES; ORGANIZATION; INFORMATION;
Keywords:
optic flow; visual processing; lobula plate; computational maps; evolution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Douglass, JK Univ Arizona, Arizona Res Labs, Div Neurobiol, 611 Gould Simpson Bldg, Tucson, AZ 85721 USA Univ Arizona 611 Gould Simpson Bldg Tucson AZ USA 85721 1 USA
Citazione:
J.K. Douglass e N.J. Strausfeld, "Optic flow representation in the optic lobes of Diptera: modeling innervation matrices onto collators and their evolutionary implications", J COMP PH A, 186(9), 2000, pp. 799-811

Abstract

A network model of optic now processing, based on physiological and anatomical features of motion-processing neurons, is used to investigate the roleof small-field motion detectors emulating T5 cells in producing optic flowselective properties in wide-field collator neurons. The imposition of different connectivities can mimic variations observed in comparative studies of lobula plate architecture across the Diptera. The results identify two features that are crucial for optic flow selectivity: the broadness of the spatial patterns of synaptic connections from motion detectors to collators,and the relative contributions of excitatory and inhibitory synaptic outputs. If these two aspects of the innervation matrix are balanced appropriately, the network's sensitivity to perturbations in physiological properties of the small-field motion detectors is dramatically reduced, suggesting that sensory systems can evolve robust mechanisms that do not rely upon precise control of network parameters. These results also suggest that alternative lobula plate architectures observed in insects are consistent in allowingoptic flow selective properties in wide-field neurons. The implications for the evolution of optic flow selective neurons are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:21:55