The causal role of the occipital face area (OFA) and lateral occipital (LO) cortex in symmetry perception

Silvia Bona, Zaira Cattaneo, Juha Silvanto

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Symmetry is an important cue in face and object perception. Here we used fMRI-guided transcranial magnetic stimulation (TMS) to shed light on the role of the occipital face area (OFA), a key region in face processing, and the lateral occipital (LO) cortex, a key area in object processing, in symmetry detection. In the first experiment, we applied TMS over the rightOFA, its left homolog (leftOFA), rightLO, and vertex (baseline) while participants were discriminating between symmetric and asymmetric dot patterns. Stimulation of rightOFA and rightLO impaired performance, causally implicating these two regions in detection of symmetry in low-level dot configurations.TMSover rightLO but not rightOFA also significantly impaired detection of nonsymmetric shapes defined by collinear Gabor patches, demonstrating that rightOFA responds to symmetry but not to all cues mediating figure-ground segregation. The second experiment showed a causal role for rightOFA but not rightLO in facial symmetry detection. Overall, our results demonstrate that both the rightOFA and rightLO are sensitive to symmetry in dot patterns, whereas only rightOFA is causally involved in facial symmetry detection.

Original languageEnglish
Pages (from-to)731-738
Number of pages8
JournalJournal of Neuroscience
Volume35
Issue number2
DOIs
Publication statusPublished - Jan 14 2015

Fingerprint

Occipital Lobe
Transcranial Magnetic Stimulation
Cues
Magnetic Resonance Imaging

Keywords

  • Bilateral symmetry
  • FMRI-guided TMS
  • Lateral occipital cortex
  • Occipital face area
  • Symmetry detection
  • Visual cortex

ASJC Scopus subject areas

  • Neuroscience(all)
  • Medicine(all)

Cite this

The causal role of the occipital face area (OFA) and lateral occipital (LO) cortex in symmetry perception. / Bona, Silvia; Cattaneo, Zaira; Silvanto, Juha.

In: Journal of Neuroscience, Vol. 35, No. 2, 14.01.2015, p. 731-738.

Research output: Contribution to journalArticle

@article{b3eb45ac0ac7447ebc7862d93a22be14,
title = "The causal role of the occipital face area (OFA) and lateral occipital (LO) cortex in symmetry perception",
abstract = "Symmetry is an important cue in face and object perception. Here we used fMRI-guided transcranial magnetic stimulation (TMS) to shed light on the role of the occipital face area (OFA), a key region in face processing, and the lateral occipital (LO) cortex, a key area in object processing, in symmetry detection. In the first experiment, we applied TMS over the rightOFA, its left homolog (leftOFA), rightLO, and vertex (baseline) while participants were discriminating between symmetric and asymmetric dot patterns. Stimulation of rightOFA and rightLO impaired performance, causally implicating these two regions in detection of symmetry in low-level dot configurations.TMSover rightLO but not rightOFA also significantly impaired detection of nonsymmetric shapes defined by collinear Gabor patches, demonstrating that rightOFA responds to symmetry but not to all cues mediating figure-ground segregation. The second experiment showed a causal role for rightOFA but not rightLO in facial symmetry detection. Overall, our results demonstrate that both the rightOFA and rightLO are sensitive to symmetry in dot patterns, whereas only rightOFA is causally involved in facial symmetry detection.",
keywords = "Bilateral symmetry, FMRI-guided TMS, Lateral occipital cortex, Occipital face area, Symmetry detection, Visual cortex",
author = "Silvia Bona and Zaira Cattaneo and Juha Silvanto",
year = "2015",
month = "1",
day = "14",
doi = "10.1523/JNEUROSCI.3733-14.2015",
language = "English",
volume = "35",
pages = "731--738",
journal = "Journal of Neuroscience",
issn = "0270-6474",
publisher = "Society for Neuroscience",
number = "2",

}

TY - JOUR

T1 - The causal role of the occipital face area (OFA) and lateral occipital (LO) cortex in symmetry perception

AU - Bona, Silvia

AU - Cattaneo, Zaira

AU - Silvanto, Juha

PY - 2015/1/14

Y1 - 2015/1/14

N2 - Symmetry is an important cue in face and object perception. Here we used fMRI-guided transcranial magnetic stimulation (TMS) to shed light on the role of the occipital face area (OFA), a key region in face processing, and the lateral occipital (LO) cortex, a key area in object processing, in symmetry detection. In the first experiment, we applied TMS over the rightOFA, its left homolog (leftOFA), rightLO, and vertex (baseline) while participants were discriminating between symmetric and asymmetric dot patterns. Stimulation of rightOFA and rightLO impaired performance, causally implicating these two regions in detection of symmetry in low-level dot configurations.TMSover rightLO but not rightOFA also significantly impaired detection of nonsymmetric shapes defined by collinear Gabor patches, demonstrating that rightOFA responds to symmetry but not to all cues mediating figure-ground segregation. The second experiment showed a causal role for rightOFA but not rightLO in facial symmetry detection. Overall, our results demonstrate that both the rightOFA and rightLO are sensitive to symmetry in dot patterns, whereas only rightOFA is causally involved in facial symmetry detection.

AB - Symmetry is an important cue in face and object perception. Here we used fMRI-guided transcranial magnetic stimulation (TMS) to shed light on the role of the occipital face area (OFA), a key region in face processing, and the lateral occipital (LO) cortex, a key area in object processing, in symmetry detection. In the first experiment, we applied TMS over the rightOFA, its left homolog (leftOFA), rightLO, and vertex (baseline) while participants were discriminating between symmetric and asymmetric dot patterns. Stimulation of rightOFA and rightLO impaired performance, causally implicating these two regions in detection of symmetry in low-level dot configurations.TMSover rightLO but not rightOFA also significantly impaired detection of nonsymmetric shapes defined by collinear Gabor patches, demonstrating that rightOFA responds to symmetry but not to all cues mediating figure-ground segregation. The second experiment showed a causal role for rightOFA but not rightLO in facial symmetry detection. Overall, our results demonstrate that both the rightOFA and rightLO are sensitive to symmetry in dot patterns, whereas only rightOFA is causally involved in facial symmetry detection.

KW - Bilateral symmetry

KW - FMRI-guided TMS

KW - Lateral occipital cortex

KW - Occipital face area

KW - Symmetry detection

KW - Visual cortex

UR - http://www.scopus.com/inward/record.url?scp=84920941069&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920941069&partnerID=8YFLogxK

U2 - 10.1523/JNEUROSCI.3733-14.2015

DO - 10.1523/JNEUROSCI.3733-14.2015

M3 - Article

VL - 35

SP - 731

EP - 738

JO - Journal of Neuroscience

JF - Journal of Neuroscience

SN - 0270-6474

IS - 2

ER -