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Photoreceptor and ganglion cell topographies correlate with information convergence and high acuity regions in the adult pigeon (Columba livia) retina

Querubin, Angeliza; Lee, HieRin; Provis, Jan; Bumsted O'Brien, Keely

Description

The fovea and area dorsalis are high acuity vision regions in the pigeon retina. However, the degree of neural convergence (an important determinant of acuity) has not been quantified consistently in this bird. The purpose of the study was to determine the topographic density changes and degree of photoreceptor to ganglion cell convergence in the fovea and the area dorsalis. Total photoreceptor and ganglion cell densities were calculated on the horizontal and vertical meridia. In four eyes,...[Show more]

dc.contributor.authorQuerubin, Angeliza
dc.contributor.authorLee, HieRin
dc.contributor.authorProvis, Jan
dc.contributor.authorBumsted O'Brien, Keely
dc.date.accessioned2015-12-07T22:17:34Z
dc.identifier.issn0021-9967
dc.identifier.urihttp://hdl.handle.net/1885/18635
dc.description.abstractThe fovea and area dorsalis are high acuity vision regions in the pigeon retina. However, the degree of neural convergence (an important determinant of acuity) has not been quantified consistently in this bird. The purpose of the study was to determine the topographic density changes and degree of photoreceptor to ganglion cell convergence in the fovea and the area dorsalis. Total photoreceptor and ganglion cell densities were calculated on the horizontal and vertical meridia. In four eyes, retinal topography was mapped for photoreceptors and ganglion cells. Rod density was quantified by counting anti-rod opsin-stained outer segments across the retina. The ratio of cone photoreceptors to ganglion cells, a rough measure of information convergence, was calculated. The fovea and the red field contained significantly higher mean cone and ganglion cell densities compared with the yellow field. Rods were missing from the fovea. Outside the fovea, rods comprised 20% of the photoreceptor population, with no significant density changes across the retina. The ratio of photoreceptors to ganglion cells was highest in the yellow field, suggesting a high degree of information convergence and low acuity. Our data indicate that convergence of cones onto ganglion cells in the red field is similar to that observed in the fovea. Convergence ratios in both the fovea and red field suggest greater visual acuity compared to that of the surrounding yellow field, which is consistent with the higher visual acuities that have been reported in these regions.
dc.publisherJohn Wiley & Sons Inc
dc.sourceJournal of Comparative Neurology
dc.subjectKeywords: animal cell; animal experiment; animal tissue; article; binocular convergence; cell density; Columba livia; controlled study; nonhuman; photoreceptor; pigeon; priority journal; retina cone; retina fovea; retina ganglion cell; retina rod; visual acuity; An Area dorsalis; Bird; Fovea; Vision
dc.titlePhotoreceptor and ganglion cell topographies correlate with information convergence and high acuity regions in the adult pigeon (Columba livia) retina
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume517
dc.date.issued2009
local.identifier.absfor110906 - Sensory Systems
local.identifier.ariespublicationu4118802xPUB5
local.type.statusPublished Version
local.contributor.affiliationQuerubin, Angeliza, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationLee, HieRin, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationProvis, Jan, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationBumsted O'Brien, Keely, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue5
local.bibliographicCitation.startpage711
local.bibliographicCitation.lastpage722
local.identifier.doi10.1002/cne.22178
dc.date.updated2016-02-24T10:36:35Z
local.identifier.scopusID2-s2.0-70449358503
local.identifier.thomsonID000271112000012
CollectionsANU Research Publications

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