Cited by 43Memory Processes and InfluencesReading and Literacy DevelopmentNeurobiology of Language and Bilingualism

Facilitating memory for novel characters by reducing neural repetition suppression in the left fusiform cortex

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Xue, Gui, Mei, Leilei, Chen, Chuansheng, Lu, Zhong-Lin, Poldrack, Russell A., Dong, Qi·2010·PLoS ONE

Abstract

BACKGROUND: The left midfusiform and adjacent regions have been implicated in processing and memorizing familiar words, yet its role in memorizing novel characters has not been well understood. METHODOLOGY/PRINCIPAL FINDINGS: Using functional MRI, the present study examined the hypothesis that the left midfusiform is also involved in memorizing novel characters and spaced learning could enhance the memory by enhancing the left midfusiform activity during learning. Nineteen native Chinese readers were scanned while memorizing the visual form of 120 Korean characters that were novel to the subjects. Each character was repeated four times during learning. Repetition suppression was manipulated by using two different repetition schedules: massed learning and spaced learning, pseudo-randomly mixed within the same scanning session. Under the massed learning condition, the four repetitions were consecutive (with a jittered inter-repetition interval to improve the design efficiency). Under the spaced learning condition, the four repetitions were interleaved with a minimal inter-repetition lag of 6 stimuli. Spaced learning significantly improved participants' performance during the recognition memory test administered one hour after the scan. Stronger left midfusiform and inferior temporal gyrus activities during learning (summed across four repetitions) were associated with better memory of the characters, based on both within- and cross-subjects analyses. Compared to massed learning, spaced learning significantly reduced neural repetition suppression and increased the overall activities in these regions, which were associated with better memory for novel characters. CONCLUSIONS/SIGNIFICANCE: These results demonstrated a strong link between cortical activity in the left midfusiform and memory for novel characters, and thus challenge the visual word form area (VWFA) hypothesis. Our results also shed light on the neural mechanisms of the spacing effect in memorizing novel characters.

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  • In skilled readers, activation in the left ventral occipitotemporal cortex decreased with experience/exposure to the same stimuli and for stimuli with high relative to low orthographic familiarity and lexical frequency.

    “However, in skilled readers, activation decreased with experience/exposure to the same stimuli (Wong et al., 2009; Xue et al., 2010; Song et al., 2010a, 2010b; Xue and Poldrack, 2007) and for stimuli with high relative to low orthographic familiarity (Kronbichler et al., 2007; Bruno et al., 2008) and lexical frequency (Kronbichler et al., 2007).”

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Authors
Xue, G., Mei, L., Chen, C., Lu, Z.-L., Poldrack, R. A., & Dong, Q.
Affiliations
  • University of Southern California (US)
  • University of California, Irvine (US)
  • The University of Texas at Austin (US)
  • Beijing Normal University (CN)
Corresponding author
Xue, Gui
Venue
PLoS ONE
Published
2010-10-06
Volume
5
Issue
10
Pages
e13204
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2148570756
Cited by
43
References
66
Citations by year
2026: 3 · 2025: 1 · 2024: 2 · 2022: 1 · 2021: 1 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 8 · 2014: 2 · 2013: 4 · 2012: 7
FWCI
2.90
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
  • Texas ScholarWorks (Texas Digital Library) (submittedVersion, cc-by)
Funders
  • National Science Foundation (0823624, 0823495)
  • Higher Education Discipline Innovation Project (B07008)
  • Program for New Century Excellent Talents in University
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD057884-01A2, R01HD057884)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Social Sciences › Psychology › Developmental and Educational Psychology › Reading and Literacy Development
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
Keywords
spaced learning, massed learning, repetition suppression, visual word form area, inferior temporal gyrus, recognition memory, Chinese readers, Korean characters, spacing effect
MeSH terms
Adult, Cerebral Cortex, Female, Humans, Language, Learning, Magnetic Resonance Imaging, Male, Memory

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