Responding appropriately to threats relies in part on our capacity to learn subtle threat–safety discriminations. Here, we relate individual differences in early emerging, longitudinally assessed, socially reticent behavior to interactions between moment-to-moment brain activity and SCRs during a fear extinction recall paradigm. While prior functional magnetic resonance imaging (fMRI) studies examine threat circuit function in such children ( Britton et al., 2013 Shechner et al., 2018), none examine associations among temperament, SCRs, and neural responses to threats. low levels of social reticence or shyness. Dynamic interactions between SCRs and the brain may unfold differently in children with different temperamental profiles, such as high vs.
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These include reflexive skin conductance responses (SCRs, Boucsein, 1992 Dawson, Schell & Filion, 2007), which interact with the brain dynamically to optimize behavior ( Nieuwenhuis et al., 2011).
This pattern of SCR-BOLD coupling may reflect selective difficulty tracking safety in a temperamentally at-risk population.Įncountering threats evokes a cascade of autonomic changes. These interactions occurred in three main brain areas: the anterior insular cortex (AIC), the anterior subdivision of the medial cingulate cortex (aMCC), and the dorsolateral prefrontal cortex (dlPFC). SR and attention focus impacted associations between trial-by-trial variation in autonomic responding and in brain activation. Specifically, childhood SR was associated with a distinct pattern of hemodynamic-autonomic covariation in the brain when recalling extinguished threat and safety cues. Whereas self-report and psychophysiological measures of differential conditioning, extinction, and extinction recall were largely similar across participants, SR-related differences in brain function emerged during extinction recall. Three weeks after undergoing fear conditioning and extinction, participants completed a functional magnetic resonance imaging extinction recall task assessing memory and threat differentiation for conditioned stimuli. We compared brain function and behavior during extinction recall in a sample of 11-to-15-year-old children characterized in early childhood on a continuum of SR. Threat circuit function may develop differently for children high on SR than low on SR. Social Reticence (SR) is a temperament construct identified in early childhood that is expressed as shy, anxiously avoidant behavior and, particularly when stable, robustly associated with risk for anxiety disorders.
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