Facilitation of naming in aphasia with auditory repetition: an investigation of neurocognitive mechanisms

Heath, Shiree, McMahon, Katie L., Nickels, Lyndsey, Angwind, Anthony, MacDonald, Anna D., van Hees, Sophia, McKinnon, Eril, Johnson, Kori and Copland, David A. (2013) Facilitation of naming in aphasia with auditory repetition: an investigation of neurocognitive mechanisms. Neuropsychologia, 51 8: 1534-1548. doi:10.1016/j.neuropsychologia.2013.05.008


Author Heath, Shiree
McMahon, Katie L.
Nickels, Lyndsey
Angwind, Anthony
MacDonald, Anna D.
van Hees, Sophia
McKinnon, Eril
Johnson, Kori
Copland, David A.
Title Facilitation of naming in aphasia with auditory repetition: an investigation of neurocognitive mechanisms
Journal name Neuropsychologia   Check publisher's open access policy
ISSN 0028-3932
1873-3514
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1016/j.neuropsychologia.2013.05.008
Volume 51
Issue 8
Start page 1534
End page 1548
Total pages 15
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2014
Language eng
Formatted abstract
Prior phonological processing can enhance subsequent picture naming performance in individuals with aphasia, yet the neurocognitive mechanisms underlying this effect and its longevity are unknown. This study used functional magnetic resonance imaging to examine the short-term (within minutes) and long-term (within days) facilitation effects from a phonological task in both participants with aphasia and age-matched controls. Results for control participants suggested that long-term facilitation of subsequent picture naming may be driven by a strengthening of semantic-phonological connections, while semantic and object recognition mechanisms underlie more short-term effects. All participants with aphasia significantly improved in naming accuracy following both short- and long-term facilitation. A descriptive comparison of the neuroimaging results identified different patterns of activation for each individual with aphasia. The exclusive engagement of a left hemisphere phonological network underlying facilitation was not revealed. The findings suggest that improved naming in aphasia with phonological tasks may be supported by changes in right hemisphere activity in some individuals and reveal the potential contribution of the cerebellum to improved naming following phonological facilitation. Conclusions must be interpreted with caution, however, due to the comparison of corrected group control results to that of individual participants with aphasia, which were not corrected for multiple comparisons.
Keyword Aphasia
Auditory repetition
FMRI
Overt picture naming
Phonology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 18 Jun 2013, 11:24:12 EST by Sandrine Ducrot on behalf of Centre for Advanced Imaging