Parallel processing in human visual cortex revealed through the influence of their neural responses on the visual evoked potential.
The neural response in the human visual system is composed of magno-, parvo- and koniocellular input from the retina. Signal differences from functional imaging between health and individuals with a cognitive weakness are attributed to a dysfunction of a specific retinal input. Yet, anatomical inter...
| Publicado en: | Vision Research Vol. 193 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Pergamon Press - An Imprint of Elsevier Science
Apr2022
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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=155102247&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 155102247 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00426989 2FL jtl: Vision Research issn: 00426989 maglogo: N pubinfo: dt: Apr2022 vid: 193 pid: 2410 pub: Pergamon Press - An Imprint of Elsevier Science artinfo: ui: 155102247 155102247 NLM34979298 10.1016/j.visres.2021.107994 NLM34979298 155102247 ppct: 1 formats: tig: atl: Parallel processing in human visual cortex revealed through the influence of their neural responses on the visual evoked potential. aug: au: Marcar, V.L. Battegay, E. Schmidt, D. Cheetham, M. affil: University Hospital Zurich, Department of Internal Medicine, Rämistrasse 100, CH-8091 Zürich, Switzerland sug: subj: Occipital Lobe Physiology Eye Diseases Retina Physiology Physical Stimulation Methods Evoked Potentials, Visual Adult Clinical Assessment Tools Adult: 19-44 years ab: The neural response in the human visual system is composed of magno-, parvo- and koniocellular input from the retina. Signal differences from functional imaging between health and individuals with a cognitive weakness are attributed to a dysfunction of a specific retinal input. Yet, anatomical interconnections within the human visual system obscure individual contribution to the neural response in V1. Deflections in the visual evoked potential (VEP) arise from an interaction between electric dipoles, their strength determined by the size of the neural population active during temporal - and spatial luminance contrast processing. To investigate interaction between these neural responses, we recorded the VEP over visual cortex of 14 healthy adults viewing four series of windmill patterns. Within a series, the relative area white in a pattern varied systematically. Between series, the number of sectors across which this area was distributed doubled. These patterns were viewed as pattern alternating and on-/off stimuli. P100/P1 amplitude increased linearly with the relative area white in the pattern, while N135/N1 and P240/P2 amplitude increased with the number of sectors of which the area white was distributed. The decreases P100 amplitude with increasing number of sectors is attributed to an interaction between electric dipoles located in granular and supragranular layers of V1. Differences between the VEP components obtained during a pattern reversing display and following pattern onset are accounted for by the transient and sustained nature of neural responses processing temporal - and spatial luminance contrast and ability of these responses to manifest in the VEP. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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