Global motion perception is independent from contrast sensitivity for coherent motion direction discrimination and visual acuity in 4.5-year-old children.
Global motion processing depends on a network of brain regions that includes extrastriate area V5 in the dorsal visual stream. For this reason, psychophysical measures of global motion perception have been used to provide a behavioral measure of dorsal stream function. This approach assumes that glo...
| Publicado en: | Vision Research Vol. 115; pp. 83 - 92 |
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| Autores principales: | , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Pergamon Press - An Imprint of Elsevier Science
Oct2015 Part A
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=109953739&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 109953739 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00426989 2FL jtl: Vision Research issn: 00426989 maglogo: N pubinfo: dt: Oct2015 Part A vid: 115 pid: 2410 pub: Pergamon Press - An Imprint of Elsevier Science artinfo: ui: 109953739 109953739 NLM26318529 109953739 10.1016/j.visres.2015.08.007 NLM26318529 PMC4587337 [Available on 10/01/16] 109953739 ppf: 83 ppct: 9 formats: tig: atl: Global motion perception is independent from contrast sensitivity for coherent motion direction discrimination and visual acuity in 4.5-year-old children. aug: au: Chakraborty, Arijit Anstice, Nicola S. Jacobs, Robert J. Paudel, Nabin LaGasse, Linda L. Lester, Barry M. Wouldes, Trecia A. Harding, Jane E. Thompson, Benjamin affil: School of Optometry and Vision Science, University of Auckland, New Zealand sug: subj: Visual Perception Physiology Visual Acuity Physiology Male Prospective Studies Perception Psychophysics Female Eye Movements Analysis of Variance Physical Stimulation Methods Depth Perception Physiology Child, Preschool Funding Source Human Child, Preschool: 2-5 years Male Female ab: Global motion processing depends on a network of brain regions that includes extrastriate area V5 in the dorsal visual stream. For this reason, psychophysical measures of global motion perception have been used to provide a behavioral measure of dorsal stream function. This approach assumes that global motion is relatively independent of visual functions that arise earlier in the visual processing hierarchy such as contrast sensitivity and visual acuity. We tested this assumption by assessing the relationships between global motion perception, contrast sensitivity for coherent motion direction discrimination (henceforth referred to as contrast sensitivity) and habitual visual acuity in a large group of 4.5-year-old children (n=117). The children were born at risk of abnormal neurodevelopment because of prenatal drug exposure or risk factors for neonatal hypoglycemia. Motion coherence thresholds, a measure of global motion perception, were assessed using random dot kinematograms. The contrast of the stimuli was fixed at 100% and coherence was varied. Contrast sensitivity was measured using the same stimuli by fixing motion coherence at 100% and varying dot contrast. Stereoacuity was also measured. Motion coherence thresholds were not correlated with contrast sensitivity or visual acuity. However, lower (better) motion coherence thresholds were correlated with finer stereoacuity (ρ=0.38, p=0.004). Contrast sensitivity and visual acuity were also correlated (ρ=-0.26, p=0.004) with each other. These results indicate that global motion perception for high contrast stimuli is independent of contrast sensitivity and visual acuity and can be used to assess motion integration mechanisms in children. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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