Subcortical amygdala pathways enable rapid face processing

Garvert, Mona M., Friston, Karl J., Dolan, Raymond J. and Garrido, Marta I. (2014) Subcortical amygdala pathways enable rapid face processing. NeuroImage, 102 P2: 309-316. doi:10.1016/j.neuroimage.2014.07.047

Author Garvert, Mona M.
Friston, Karl J.
Dolan, Raymond J.
Garrido, Marta I.
Title Subcortical amygdala pathways enable rapid face processing
Journal name NeuroImage   Check publisher's open access policy
ISSN 1053-8119
Publication date 2014-11-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.neuroimage.2014.07.047
Open Access Status DOI
Volume 102
Issue P2
Start page 309
End page 316
Total pages 8
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2015
Language eng
Abstract Human faces may signal relevant information and are therefore analysed rapidly and effectively by the brain. However, the precise mechanisms and pathways involved in rapid face processing are unclear. One view posits a role for a subcortical connection between early visual sensory regions and the amygdala, while an alternative account emphasises cortical mediation. To adjudicate between these functional architectures, we recorded magnetoencephalographic (MEG) evoked fields in human subjects to presentation of faces with varying emotional valence. Early brain activity was better explained by dynamic causal models containing a direct subcortical connection to the amygdala irrespective of emotional modulation. At longer latencies, models without a subcortical connection had comparable evidence. Hence, our results support the hypothesis that a subcortical pathway to the amygdala plays a role in rapid sensory processing of faces, in particular during early stimulus processing. This finding contributes to an understanding of the amygdala as a behavioural relevance detector.
Keyword Amygdala
Dynamic causal modelling
Subcortical processing
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
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