Neuroimaging the short- and long-term effects of repeated picture naming in healthy older adults

MacDonald, Anna D., Heath, Shiree, McMahon, Katie L., Nickels, Lyndsey, Angwin, Anthony J., van Hees, Sophia, Johnson, Kori and Copland, David A. (2015) Neuroimaging the short- and long-term effects of repeated picture naming in healthy older adults. Neuropsychologia, 75 170-178. doi:10.1016/j.neuropsychologia.2015.06.007

Author MacDonald, Anna D.
Heath, Shiree
McMahon, Katie L.
Nickels, Lyndsey
Angwin, Anthony J.
van Hees, Sophia
Johnson, Kori
Copland, David A.
Title Neuroimaging the short- and long-term effects of repeated picture naming in healthy older adults
Journal name Neuropsychologia   Check publisher's open access policy
ISSN 1873-3514
Publication date 2015-08-01
Sub-type Article (original research)
DOI 10.1016/j.neuropsychologia.2015.06.007
Open Access Status Not yet assessed
Volume 75
Start page 170
End page 178
Total pages 9
Place of publication Kidlington, Oxford, United Kingdom
Publisher Elsevier
Language eng
Abstract Repeated attempts to name pictures can improve subsequent naming for aphasic individuals with anomia, however, the neurocognitive mechanisms responsible for such improvements are unknown. This study investigated repeated picture naming in healthy older adults over a period of minutes (short-term) after one repetition and a period of days (long-term) after multiple repetitions. Compared to unprimed pictures, both repeated conditions showed faster naming latencies with the fastest latencies evident for the short-term condition. Neuroimaging results identified repetition suppression effects across three left inferior frontal gyrus regions of interest: for both the short- and long-term conditions in the pars orbitalis, and for long-term items in the pars triangularis and pars opercularis regions. The whole brain analysis also showed a repetition suppression effect in bilateral pars triangularis regions for the long-term condition. These findings within the inferior frontal gyrus suggest that effects of repeated naming may be driven by a mapping mechanism across multiple levels of representation, possibly reflecting different levels of learning, and lend support to the idea that processing may be hierarchically organised in the left inferior frontal gyrus. The whole brain analysis also revealed repetition suppression for the long-term condition within the posterior portion of bilateral inferior temporal gyri, which may reflect attenuation of integration processes within this region following the learning of task-relevant information.
Keyword FMRI
Picture naming
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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