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Temporal dynamics of face repetition suppression.
Brain Res Bull. 2006 Oct 16; 70(4-6):289-95.BR

Abstract

Single-unit recordings and functional brain imaging studies have shown reduced neural responses to repeated stimuli in the visual cortex. Using MEG, we compared responses evoked by repetitions of neutral faces to those evoked by fearful faces, which were either task relevant (targets) or irrelevant (distracters). Faces evoked a bi-phasic response in extrastriate cortex, peaking at 160-185 ms and at 220-250 ms, with stronger responses to neutral faces at the earlier interval and stronger responses to fearful faces at the later interval. At both latencies, repetitions of neutral and fearful targets resulted in reduced amplitude of the MEG signal. Additionally, we found that the context in which targets were presented affected their processing: fearful distracters increased the responses evoked by both neutral and fearful targets. Our data indicate that valence enhancement and context effects can be detected in extrastriate visual cortex within 250 ms and that these processes likely reflect feedback from other regions.

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Authors+Show Affiliations

Ishai A
Institute of Neuroradiology, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland. ishai@hifo.unizh.ch
Bikle PC
No affiliation info available
Ungerleider LG
No affiliation info available

MeSH

AdultBrain MappingEvoked Potentials, VisualFaceFacial ExpressionFearFemaleHumansMagnetoencephalographyMaleNonlinear DynamicsPhotic StimulationReaction TimeRepression, PsychologyTime FactorsVisual Cortex

Pub Type(s)

Comparative Study
Journal Article
Research Support, N.I.H., Intramural

Language

eng

PubMed ID

17027764

Citation

Ishai, Alumit, et al. "Temporal Dynamics of Face Repetition Suppression." Brain Research Bulletin, vol. 70, no. 4-6, 2006, pp. 289-95.
Ishai A, Bikle PC, Ungerleider LG. Temporal dynamics of face repetition suppression. Brain Res Bull. 2006;70(4-6):289-95.
Ishai, A., Bikle, P. C., & Ungerleider, L. G. (2006). Temporal dynamics of face repetition suppression. Brain Research Bulletin, 70(4-6), 289-95.
Ishai A, Bikle PC, Ungerleider LG. Temporal Dynamics of Face Repetition Suppression. Brain Res Bull. 2006 Oct 16;70(4-6):289-95. PubMed PMID: 17027764.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Temporal dynamics of face repetition suppression. AU - Ishai,Alumit, AU - Bikle,Philip C, AU - Ungerleider,Leslie G, Y1 - 2006/06/27/ PY - 2006/03/31/received PY - 2006/05/21/revised PY - 2006/06/01/accepted PY - 2006/10/10/pubmed PY - 2006/12/9/medline PY - 2006/10/10/entrez SP - 289 EP - 95 JF - Brain research bulletin JO - Brain Res Bull VL - 70 IS - 4-6 N2 - Single-unit recordings and functional brain imaging studies have shown reduced neural responses to repeated stimuli in the visual cortex. Using MEG, we compared responses evoked by repetitions of neutral faces to those evoked by fearful faces, which were either task relevant (targets) or irrelevant (distracters). Faces evoked a bi-phasic response in extrastriate cortex, peaking at 160-185 ms and at 220-250 ms, with stronger responses to neutral faces at the earlier interval and stronger responses to fearful faces at the later interval. At both latencies, repetitions of neutral and fearful targets resulted in reduced amplitude of the MEG signal. Additionally, we found that the context in which targets were presented affected their processing: fearful distracters increased the responses evoked by both neutral and fearful targets. Our data indicate that valence enhancement and context effects can be detected in extrastriate visual cortex within 250 ms and that these processes likely reflect feedback from other regions. SN - 0361-9230 UR - https://www.unboundmedicine.com/medline/citation/17027764/Temporal_dynamics_of_face_repetition_suppression_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0361-9230(06)00196-1 DB - PRIME DP - Unbound Medicine ER -