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Title

The Commonality of Neural Networks for Verbal and Visual Short-term Memory

Authors
Majerus, Steve
D'Argembeau, Arnaud
Martinez Perez, Trecy
Collette, Fabienne
Salmon, Eric
Seurinck, Ruth
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Published in Journal of cognitive neuroscience. 2010, vol. 22, no. 11, p. 2570-2593
Abstract Although many neuroimaging studies have considered verbal and visual short-term memory (STM) as relying on neurally segregated short-term buffer systems, the present study explored the existence of shared neural correlates supporting verbal and visual STM. We hypothesized that networks involved in attentional and executive processes, as well as networks involved in serial order processing, underlie STM for both verbal and visual list information, with neural specificity restricted to sensory areas involved in processing the specific items to be retained. Participants were presented sequences of nonwords or unfamiliar faces, and were instructed to maintain and recognize order or item information. For encoding and retrieval phases, null conjunction analysis revealed an identical fronto-parieto-cerebellar network comprising the left intraparietal sulcus, bilateral dorsolateral prefrontal cortex, and the bilateral cerebellum, irrespective of information type and modality. A network centered around the right intraparietal sulcus supported STM for order information, in both verbal and visual modalities. Modality-specific effects were observed in left superior temporal and mid-fusiform areas associated with phonological and orthographic processing during the verbal STM tasks, and in right hippocampal and fusiform face processing areas during the visual STM tasks, wherein these modality effects were most pronounced when storing item information. The present results suggest that STM emerges from the deployment of modality-independent attentional and serial ordering processes toward sensory networks underlying the processing and storage of modality-specific item information.
Keywords Acoustic Stimulation/methodsAdultAssociation Learning/physiologyAttention/physiologyBrain/blood supply/physiologyBrain MappingFaceFemaleFunctional Laterality/physiologyHumansImage Processing, Computer-Assisted/methodsMagnetic Resonance ImagingMaleMemory, Short-Term/physiologyNeural Pathways/physiologyOxygen/bloodPattern Recognition, Visual/physiologyPhotic Stimulation/methodsReaction Time/physiologyRecognition (Psychology)/physiologyVerbal Learning/physiologyYoung Adult
Identifiers
PMID: 19925207
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Structures
Research groups Affective sciences
Unité de psychopathologie et neuropsychologie cognitive (UPNC)
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MAJERUS, Steve et al. The Commonality of Neural Networks for Verbal and Visual Short-term Memory. In: Journal of cognitive neuroscience, 2010, vol. 22, n° 11, p. 2570-2593. https://archive-ouverte.unige.ch/unige:29420

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Deposited on : 2013-08-23

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