First and second-order motion perception after focal human brain lesions.
Perception of visual motion includes a first-order mechanism sensitive to luminance changes and a second-order motion mechanism sensitive to contrast changes. We studied neural substrates for these motion types in 142 subjects with visual cortex lesions, 68 normal controls and 28 brain lesion contro...
| Publicado en: | Vision Research Vol. 48; no. 26; pp. 2682 - 2689 |
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| Autores principales: | , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Pergamon Press - An Imprint of Elsevier Science
Nov2008
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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=105628191&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105628191 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00426989 2FL jtl: Vision Research issn: 00426989 maglogo: N pubinfo: dt: Nov2008 vid: 48 iid: 26 pid: 2410 pub: Pergamon Press - An Imprint of Elsevier Science artinfo: ui: 105628191 NLM18440580 2010160815 10.1016/j.visres.2008.03.005 NLM18440580 PMC3169341 105628191 ppf: 2682 ppct: 7 formats: tig: atl: First and second-order motion perception after focal human brain lesions. aug: au: Rizzo M Nawrot M Sparks J Dawson J Rizzo, Matthew Nawrot, Mark Sparks, Jondavid Dawson, Jeffrey affil: Department of Neurology, The University of Iowa College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, USA sug: subj: Brain Damage, Chronic Psychosocial Factors Perceptual Disorders Etiology Visual Perception Adult Aged Aged, 80 and Over Brain Damage, Chronic Physiopathology Brain Mapping Methods Female Male Middle Age Occipital Lobe Physiopathology Perception Perceptual Disorders Physiopathology Perceptual Disorders Psychosocial Factors Physical Stimulation Methods Psychometrics Visual Acuity Human Adult: 19-44 years Aged: 65+ years Aged, 80 & over Middle Aged: 45-64 years Female Male ab: Perception of visual motion includes a first-order mechanism sensitive to luminance changes and a second-order motion mechanism sensitive to contrast changes. We studied neural substrates for these motion types in 142 subjects with visual cortex lesions, 68 normal controls and 28 brain lesion controls. On first-order motion, the visual cortex lesion group performed significantly worse than normal controls overall and in each hemifield, but second-order motion did not differ. Only one individual showed a selective second-order motion deficit. Motion deficits were seen with lesions outside the small occipito-temporal region thought to contain a human homolog of motion processing area MT (V5), suggesting that many areas of human brain process visual motion. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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