Skip navigation
Skip navigation

Spatial-frequency tuning in the pooling of one-and two- dimensional motion signals

Amano, Kaoru; Edwards, Mark; Badcock, David Russell; Nishida, Shin'ya

Description

Cortical neurons that initially extract motion signals have small receptive-fields, and narrow orientation- and bandpass-spatial-frequency tuning. Accurate extraction of the veridical motion of objects typically requires the global pooling of the output of multiple local-motion units across orientation and space. We examined whether the narrow spatial-frequency tuning present at the local-motion level is preserved at the global-motion-pooling stage. Stimuli consisted of numerous drifting Gabor...[Show more]

dc.contributor.authorAmano, Kaoru
dc.contributor.authorEdwards, Mark
dc.contributor.authorBadcock, David Russell
dc.contributor.authorNishida, Shin'ya
dc.date.accessioned2015-12-08T22:45:24Z
dc.identifier.issn0042-6989
dc.identifier.urihttp://hdl.handle.net/1885/37817
dc.description.abstractCortical neurons that initially extract motion signals have small receptive-fields, and narrow orientation- and bandpass-spatial-frequency tuning. Accurate extraction of the veridical motion of objects typically requires the global pooling of the output of multiple local-motion units across orientation and space. We examined whether the narrow spatial-frequency tuning present at the local-motion level is preserved at the global-motion-pooling stage. Stimuli consisted of numerous drifting Gabor or plaid elements that were either signal (carrier drift-speed consistent with a given global-motion vector) or noise (drift speed consistent with a random, noise vector). The carrier spatial-frequencies of the signal and noise elements were independently varied. Regardless of the frequency of the signal elements, broad low-pass masking functions were obtained for both Gabor (one-dimensional) and Plaid (two-dimensional) conditions when measuring the threshold signal ratio for identification of the global-motion direction. For the Gabor stimuli, this pattern of results was also independent of the relative orientations of the signal and noise elements. These results indicate that in the global-motion pooling of one-dimensional and two-dimensional signals, local-motion signals of all spatial frequencies are pooled into a single system that exhibits broadband, low-pass tuning.
dc.publisherPergamon-Elsevier Ltd
dc.sourceVision Research
dc.subjectKeywords: article; brain cortex; grating; human; human experiment; luminance; motion; normal human; orientation; priority journal; receptive field; signal transduction; space; spatial frequency discrimination; visual acuity; visual stimulation; visual system; Cereb Direction-discrimination; Gabor; Global-motion; Motion integration; Spatial frequency
dc.titleSpatial-frequency tuning in the pooling of one-and two- dimensional motion signals
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume49
dc.date.issued2009
local.identifier.absfor170112 - Sensory Processes, Perception and Performance
local.identifier.ariespublicationu9312950xPUB153
local.type.statusPublished Version
local.contributor.affiliationAmano, Kaoru, University of Tokyo
local.contributor.affiliationEdwards, Mark, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationBadcock, David Russell, University of Western Australia
local.contributor.affiliationNishida, Shin'ya, Nippon Telegraph &Telephone Corporation (NTT)
local.description.embargo2037-12-31
local.bibliographicCitation.issue23
local.bibliographicCitation.startpage2862
local.bibliographicCitation.lastpage2869
local.identifier.doi10.1016/j.visres.2009.08.026
dc.date.updated2016-02-24T11:58:17Z
local.identifier.scopusID2-s2.0-70449520486
local.identifier.thomsonID000272134000014
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Amano_Spatial-frequency_tuning_in_2009.pdf391.15 kBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  22 January 2019/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator