Cited by 122Functional Brain Connectivity StudiesVisual perception and processing mechanismsAdvanced MRI Techniques and Applications

Spatial smoothing hurts localization but not information: Pitfalls for brain mappers

Kamitani, Yukiyasu, Sawahata, Yasuhito·2010·NeuroImage

Abstract

Op de Beeck (Op de Beeck, H., 2009. Against hyperacuity in brain reading: Spatial smoothing does not hurt multivariate fMRI analyses? Neuroimage) challenges the possibility of extracting information from subvoxel representations via random biases associated with voxel sampling, the hypothesis proposed by Kamitani and Tong (Kamitani, Y., Tong, F., 2005. Decoding the visual and subjective contents of the human brain. Nat. Neurosci. 8, 679-685). Here, we show that his results provide no evidence against the possibility, being consistent with both of the subvoxel and supravoxel representation models. Classification of spatially smoothed fMRI data is not an effective means to probe into information sources for multivoxel decoding, since smoothing does not hurt the information contents of multivoxel patterns. We point out the danger of interpreting multivoxel decoding results based on intuitions guided by the conventional brain mapping paradigm.

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Crossref · 10.1016/j.neuroimage.2009.06.040

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Authors
Kamitani, Y., & Sawahata, Y.
Affiliations
Advanced Telecommunications Research Institute International (JP)
Corresponding author
Kamitani, Yukiyasu
Venue
NeuroImage
Publisher
Elsevier BV
Published
2010-02
Volume
49
Issue
3
Pages
1949-1952
ISSN
1053-8119 (ISSN-L)
OpenAlex
W2053644821
Cited by
122
References
5
Citations by year
2026: 4 · 2025: 5 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 3 · 2020: 9 · 2019: 6 · 2018: 5 · 2017: 10 · 2016: 10 · 2015: 7 · 2014: 9 · 2013: 8 · 2012: 15
FWCI
5.81
Type
journal article
Language
en
Open access
closed
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
Funders
Nissan Global Foundation
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
spatial smoothing, brain mapping, fMRI classification, hyperacuity
MeSH terms
Brain, Brain Mapping, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging

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