Emotional faces and the default mode network.

S Sreenivas, S G Boehm, D E J Linden
Author Information
  1. S Sreenivas: North Wales Organisation for Randomised Trials in Health & Social Care, Bangor University, Bangor, UK.

Abstract

The default-mode network (DMN) of the human brain has become a central topic of cognitive neuroscience research. Although alterations in its resting state activity and in its recruitment during tasks have been reported for several mental and neurodegenerative disorders, its role in emotion processing has received relatively little attention. We investigated brain responses to different categories of emotional faces with functional magnetic resonance imaging (fMRI) and found deactivation in ventromedial prefrontal cortex (VMPFC), posterior cingulate gyrus (PC) and cuneus. This deactivation was modulated by emotional category and was less prominent for happy than for sad faces. These deactivated areas along the midline conformed to areas of the DMN. We also observed emotion-dependent deactivation of the left middle frontal gyrus, which is not a classical component of the DMN. Conversely, several areas in a fronto-parietal network commonly linked with attention were differentially activated by emotion categories. Functional connectivity patterns, as obtained by correlation of activation levels, also varied between emotions. VMPFC, PC or cuneus served as hubs between the DMN-type areas and the fronto-parietal network. These data support recent suggestions that the DMN is not a unitary system but differentiates according to task and even type of stimulus. The emotion-specific differential pattern of DMN deactivation may be explored further in patients with mood disorder, where the quest for biological markers of emotional biases is still ongoing.

MeSH Term

Adult
Brain
Brain Mapping
Emotions
Facial Expression
Female
Humans
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Male
Nerve Net
Young Adult

Word Cloud

Created with Highcharts 10.0.0DMNnetworkdeactivationareasemotionalfacesbrainseveralemotionattentioncategoriesVMPFCgyrusPCcuneusalsofronto-parietaldefault-modehumanbecomecentraltopiccognitiveneuroscienceresearchAlthoughalterationsrestingstateactivityrecruitmenttasksreportedmentalneurodegenerativedisordersroleprocessingreceivedrelativelylittleinvestigatedresponsesdifferentfunctionalmagneticresonanceimagingfMRIfoundventromedialprefrontalcortexposteriorcingulatemodulatedcategorylessprominenthappysaddeactivatedalongmidlineconformedobservedemotion-dependentleftmiddlefrontalclassicalcomponentConverselycommonlylinkeddifferentiallyactivatedFunctionalconnectivitypatternsobtainedcorrelationactivationlevelsvariedemotionsservedhubsDMN-typedatasupportrecentsuggestionsunitarysystemdifferentiatesaccordingtaskeventypestimulusemotion-specificdifferentialpatternmayexploredpatientsmooddisorderquestbiologicalmarkersbiasesstillongoingEmotionaldefaultmode

Similar Articles

Cited By