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PMID
24586735
TITLE
Event-related alpha suppression in response to facial motion.
ABSTRACT
While biological motion refers to both face and body movements, little is known about the visual perception of facial motion. We therefore examined alpha wave suppression as a reduction in power is thought to reflect visual activity, in addition to attentional reorienting and memory processes. Nineteen neurologically healthy adults were tested on their ability to discriminate between successive facial motion captures. These animations exhibited both rigid and non-rigid facial motion, as well as speech expressions. The structural and surface appearance of these facial animations did not differ, thus participants decisions were based solely on differences in facial movements. Upright, orientation-inverted and luminance-inverted facial stimuli were compared. At occipital and parieto-occipital regions, upright facial motion evoked a transient increase in alpha which was then followed by a significant reduction. This finding is discussed in terms of neural efficiency, gating mechanisms and neural synchronization. Moreover, there was no difference in the amount of alpha suppression evoked by each facial stimulus at occipital regions, suggesting early visual processing remains unaffected by manipulation paradigms. However, upright facial motion evoked greater suppression at parieto-occipital sites, and did so in the shortest latency. Increased activity within this region may reflect higher attentional reorienting to natural facial motion but also involvement of areas associated with the visual control of body effectors.
DATE PUBLISHED
2014
HISTORY
PUBSTATUS PUBSTATUSDATE
ecollection 2014
received 2013/07/25
accepted 2014/01/20
epublish 2014/02/19
entrez 2014/03/04 06:00
pubmed 2014/03/04 06:00
medline 2014/10/15 06:00
AUTHORS
NAME COLLECTIVENAME LASTNAME FORENAME INITIALS AFFILIATION AFFILIATIONINFO
Girges C Girges Christine C Department of Psychology, Brunel University, London, United Kingdom.
Wright MJ Wright Michael J MJ Department of Psychology, Brunel University, London, United Kingdom.
Spencer JV Spencer Janine V JV Department of Psychology, Brunel University, London, United Kingdom.
O'Brien JM O'Brien Justin M D JM Department of Psychology, Brunel University, London, United Kingdom.
INVESTIGATORS
JOURNAL
VOLUME: 9
ISSUE: 2
TITLE: PloS one
ISOABBREVIATION: PLoS ONE
YEAR: 2014
MONTH:
DAY:
MEDLINEDATE:
SEASON:
CITEDMEDIUM: Internet
ISSN: 1932-6203
ISSNTYPE: Electronic
MEDLINE JOURNAL
MEDLINETA: PLoS One
COUNTRY: United States
ISSNLINKING: 1932-6203
NLMUNIQUEID: 101285081
PUBLICATION TYPE
PUBLICATIONTYPE TEXT
Journal Article
COMMENTS AND CORRECTIONS
REFTYPE REFSOURCE REFPMID NOTE
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GRANTS
GENERAL NOTE
KEYWORDS
MESH HEADINGS
DESCRIPTORNAME QUALIFIERNAME
Adult
Analysis of Variance
Brain physiology
Discrimination (Psychology) physiology
Electroencephalography physiology
Evoked Potentials physiology
Face physiology
Female physiology
Humans physiology
Male physiology
Motion Perception physiology
SUPPLEMENTARY MESH
GENE SYMBOLS
CHEMICALS
OTHER ID's
OTHERID SOURCE
PMC3929715 NLM
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