Temporal dynamics of visual working memory

Sobczak-Edmans, M., Ng, T. H. B., Chan, Y. C., Chew, E., Chuang, K. H. and Chen, S. H. A. (2016) Temporal dynamics of visual working memory. NeuroImage, 124 1021-1030. doi:10.1016/j.neuroimage.2015.09.038

Author Sobczak-Edmans, M.
Ng, T. H. B.
Chan, Y. C.
Chew, E.
Chuang, K. H.
Chen, S. H. A.
Title Temporal dynamics of visual working memory
Journal name NeuroImage   Check publisher's open access policy
ISSN 1053-8119
Publication date 2016-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.neuroimage.2015.09.038
Open Access Status Not Open Access
Volume 124
Start page 1021
End page 1030
Total pages 10
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
The involvement of the human cerebellum in working memory has been well established in the last decade. However, the cerebro-cerebellar network for visual working memory is not as well defined. Our previous fMRI study showed superior and inferior cerebellar activations during a block design visual working memory task, but specific cerebellar contributions to cognitive processes in encoding, maintenance and retrieval have not yet been established. The current study examined cerebellar contributions to each of the components of visual working memory and presence of cerebellar hemispheric laterality was investigated. 40 young adults performed a Sternberg visual working memory task during fMRI scanning using a parametric paradigm. The contrast between high and low memory load during each phase was examined. We found that the most prominent activation was observed in vermal lobule VIIIb and bilateral lobule VI during encoding. Using a quantitative laterality index, we found that left-lateralized activation of lobule VIIIa was present in the encoding phase. In the maintenance phase, there was bilateral lobule VI and right-lateralized lobule VIIb activity. Changes in activation in right lobule VIIIa were present during the retrieval phase. The current results provide evidence that superior and inferior cerebellum contributes to visual working memory, with a tendency for left-lateralized activations in the inferior cerebellum during encoding and right-lateralized lobule VIIb activations during maintenance. The results of the study are in agreement with Baddeley's multi-component working memory model, but also suggest that stored visual representations are additionally supported by maintenance mechanisms that may employ verbal coding.
Keyword Cerebellum
Visuospatial sketchpad
Working memory
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Published online 30 September 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2016 Collection
Centre for Advanced Imaging Publications
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
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