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Neural mechanisms of context effects on face recognition: automatic binding and context shift decrements.

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522.8 Kb
Date
2010-11
Authors
Hayes, Scott M
Baena, Elsa
Truong, Trong-Kha
Cabeza, Roberto
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28
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Abstract
Although people do not normally try to remember associations between faces and physical contexts, these associations are established automatically, as indicated by the difficulty of recognizing familiar faces in different contexts ("butcher-on-the-bus" phenomenon). The present fMRI study investigated the automatic binding of faces and scenes. In the face-face (F-F) condition, faces were presented alone during both encoding and retrieval, whereas in the face/scene-face (FS-F) condition, they were presented overlaid on scenes during encoding but alone during retrieval (context change). Although participants were instructed to focus only on the faces during both encoding and retrieval, recognition performance was worse in the FS-F than in the F-F condition ("context shift decrement" [CSD]), confirming automatic face-scene binding during encoding. This binding was mediated by the hippocampus as indicated by greater subsequent memory effects (remembered > forgotten) in this region for the FS-F than the F-F condition. Scene memory was mediated by right parahippocampal cortex, which was reactivated during successful retrieval when the faces were associated with a scene during encoding (FS-F condition). Analyses using the CSD as a regressor yielded a clear hemispheric asymmetry in medial temporal lobe activity during encoding: Left hippocampal and parahippocampal activity was associated with a smaller CSD, indicating more flexible memory representations immune to context changes, whereas right hippocampal/rhinal activity was associated with a larger CSD, indicating less flexible representations sensitive to context change. Taken together, the results clarify the neural mechanisms of context effects on face recognition.
Type
Journal article
Subject
Adult
Automatism
Brain
Brain Mapping
Face
Female
Functional Laterality
Humans
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Male
Mental Recall
Oxygen
Pattern Recognition, Visual
Photic Stimulation
Reaction Time
Recognition (Psychology)
Statistics as Topic
Young Adult
Permalink
https://hdl.handle.net/10161/4621
Published Version (Please cite this version)
10.1162/jocn.2009.21379
Publication Info
Hayes, Scott M; Baena, Elsa; Truong, Trong-Kha; & Cabeza, Roberto (2010). Neural mechanisms of context effects on face recognition: automatic binding and context shift decrements. J Cogn Neurosci, 22(11). pp. 2541-2554. 10.1162/jocn.2009.21379. Retrieved from https://hdl.handle.net/10161/4621.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Cabeza

Roberto Cabeza

Professor of Psychology and Neuroscience
My laboratory investigates the neural correlates of memory and cognition in young and older adults using fMRI. We have three main lines of research: First, we distinguish the neural correlates of various episodic memory processes. For example, we have compared encoding vs. retrieval, item vs. source memory, recall vs. recognition, true vs. false memory, and emotional vs. nonemotional memory. We are particularly interested in the contribution of prefrontal cortex (PFC) and medial temporal lobe (M
Truong

Trong-Kha Truong

Associate Professor in Radiology
My research involves the development of innovative magnetic resonance imaging (MRI) coil technologies, image acquisition and reconstruction methods, artifact correction methods, and contrast mechanisms for various MRI applications in the human brain and body, such as diffusion-weighted imaging and functional MRI.
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