An fMRI investigation of the effects of attempted naming on word retrieval in aphasia

Heath, Shiree, McMahon, Katie L., Nickels, Lyndsey, Angwin, Anthony, MacDonald, Anna D., van Hees, Sophia, McKinnon, Eril, Johnson, Kori and Copland, David A. (2015) An fMRI investigation of the effects of attempted naming on word retrieval in aphasia. Frontiers in Human Neuroscience, 9 Art No.: 291: . doi:10.3389/fnhum.2015.00291

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Author Heath, Shiree
McMahon, Katie L.
Nickels, Lyndsey
Angwin, Anthony
MacDonald, Anna D.
van Hees, Sophia
McKinnon, Eril
Johnson, Kori
Copland, David A.
Title An fMRI investigation of the effects of attempted naming on word retrieval in aphasia
Journal name Frontiers in Human Neuroscience   Check publisher's open access policy
ISSN 1662-5161
Publication date 2015
Year available 2015
Sub-type Article (original research)
DOI 10.3389/fnhum.2015.00291
Open Access Status DOI
Volume 9
Issue Art No.: 291
Total pages 11
Place of publication Lausanne, Switzerland
Publisher Frontiers Research Foundation
Collection year 2016
Language eng
Formatted abstract
In healthy controls, picture naming performance can be facilitated by a single prior exposure to the same picture ("priming"). This priming phenomenon is utilized in the treatment of aphasia, which often includes repeated picture naming as part of a therapeutic task. The current study sought to determine whether single and/or multiple exposures facilitate subsequent naming in aphasia and whether such facilitatory effects act through normal priming mechanisms. A functional magnetic resonance imaging paradigm was employed to explore the beneficial effects of attempted naming in two individuals with aphasia and a control group. The timing and number of prior exposures was manipulated, with investigation of both short-term effects (single prior exposure over a period of minutes) and long-term effects (multiple presentations over a period of days). Following attempted naming, both short-term and long-term facilitated items showed improvement for controls, while only the long-term condition showed benefits at a behavioral level for the participants with aphasia. At a neural level, effects of long-term facilitation were noted in the left precuneus for one participant with aphasia, a result also identified for the equivalent contrast in controls. It appears that multiple attempts are required to improve naming performance in the presence of anomia and that for some individuals with aphasia the source of facilitation may be similar to unimpaired mechanisms engaged outside the language network.
Keyword Aphasia
Repeated picture naming
Word retrieval
fMRI
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Wed, 10 Jun 2015, 15:50:04 EST by Lorine Wilkinson on behalf of Centre for Advanced Imaging