Neural Activity Associated with Visual Search for Line Drawings on AAC Displays: An Exploration of the Use of fMRI.
Visual aided augmentative and alternative communication (AAC) consists of books or technologies that contain visual symbols to supplement spoken language. A common observation concerning some forms of aided AAC is that message preparation can be frustratingly slow. We explored the uses of fMRI to ex...
| Publicado en: | AAC: Augmentative & Alternative Communication Vol. 31; no. 4; pp. 310 - 325 |
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| Autores principales: | , , , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Dec2015
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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=110643303&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 110643303 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 07434618 9OD jtl: AAC: Augmentative & Alternative Communication issn: 07434618 maglogo: Y pubinfo: dt: Dec2015 vid: 31 iid: 4 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 110643303 110643303 110643303 10.3109/07434618.2015.1100215 NLM26517757 110643303 ppf: 310 ppct: 15 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Neural Activity Associated with Visual Search for Line Drawings on AAC Displays: An Exploration of the Use of fMRI. aug: au: Wilkinson, Krista M. Dennis, Nancy A. Webb, Christina E. Therrien, Mari Stradtman, Megan Farmer, Jacquelyn Leach, Raevynn Warrenfeltz, Megan Zeuner, Courtney affil: Department of Communication Sciences & Disorders, The Pennsylvania State University, University Park, PA, USA sug: subj: Alternative and Augmentative Communication Neural Transmission Task Performance and Analysis Mental Processes Brain Physiology Magnetic Resonance Imaging Algorithms Regression Descriptive Statistics P-Value Data Analysis Software Brain Anatomy and Histology Memory Motor Skills Human Young Adult Adult Evoked Potentials, Visual Neuroradiography Analysis of Variance T-Tests Neural Pathways Male Female Adult: 19-44 years Male Female ab: Visual aided augmentative and alternative communication (AAC) consists of books or technologies that contain visual symbols to supplement spoken language. A common observation concerning some forms of aided AAC is that message preparation can be frustratingly slow. We explored the uses of fMRI to examine the neural correlates of visual search for line drawings on AAC displays in 18 college students under two experimental conditions. Under one condition, the location of the icons remained stable and participants were able to learn the spatial layout of the display. Under the other condition, constant shuffling of the locations of the icons prevented participants from learning the layout, impeding rapid search. Brain activation was contrasted under these conditions. Rapid search in the stable display was associated with greater activation of cortical and subcortical regions associated with memory, motor learning, and dorsal visual pathways compared to the search in the unpredictable display. Rapid search for line drawings on stable AAC displays involves not just the conceptual knowledge of the symbol meaning but also the integration of motor, memory, and visual-spatial knowledge about the display layout. Further research must study individuals who use AAC, as well as the functional effect of interventions that promote knowledge about array layout. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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