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Titolo:
Optic flow representation in the optic lobes of Diptera: modeling the roleof T5 directional tuning properties
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: 783 - 797
SICI:
0340-7594(200009)186:9<783:OFRITO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL-MOTION-DETECTION; SIGNALING IMPENDING COLLISION; RECEPTIVE-FIELD ORGANIZATION; MST NEURONS; IMAGE MOTION; SELF-MOTION; DETECTION CIRCUITS; MACAQUE MONKEY; LOBULA PLATE; MACROGLOSSUM-STELLATARUM;
Keywords:
optic flow; bushy T cells; lobula plate; computational maps; distributed representations;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
81
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 the roleof T5 directional tuning properties", J COMP PH A, 186(9), 2000, pp. 783-797

Abstract

An evolutionarily conserved system of small retinotopic neurons in dipteran insects, called bushy T-cells, provides information about directional motion to large collator neurons in the lobula plate. Physiological and anatomical features of these cells provide the basis for a model that is used to investigate requirements for generating optic flow selectivity in collatorswhile allowing for evolutionary variations. This account focuses on the role of physiological tuning proper-ties of T5 neurons. Various flow fields are defined as inputs to retinotopic arrays of T5 cells, the responses of which are mapped onto collators using innervation matrices that promote selectivity for flow type and position. Properties known or inferred from physiological and anatomical studies of neurons contributing to motion detection are incorporated into the model: broad tuning to local motion direction andthe representation of each visual sampling unit by a quartet of small-field T5-like neurons with orthogonal preferred directions. The model predicts hitherto untested response properties of optic flow selective collators, and predicts that selectivity for a given flow field can be highly sensitive to perturbations ill physiological properties of the motion detectors.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 00:20:15