Article

Biological Substrates of Emotional Reactivity and Regulation in Adolescence During an Emotional Go-Nogo Task

The Sackler Institute for Developmental Psychobiology, Weill Medical College of Cornell University, New York, New York, USA.
Biological psychiatry (Impact Factor: 10.26). 06/2008; 63(10):927-34. DOI: 10.1016/j.biopsych.2008.03.015
Source: PubMed

ABSTRACT

Adolescence is a transition period from childhood to adulthood that is often characterized by emotional instability. This period is also a time of increased incidence of anxiety and depression, underscoring the importance of understanding biological substrates of behavioral and emotion regulation during adolescence. Developmental changes in the brain in concert with individual predispositions for anxiety might underlie the increased risk for poor outcomes reported during adolescence. We tested the hypothesis that difficulties in regulating behavior in emotional contexts in adolescents might be due to competition between heightened activity in subcortical emotional processing systems and immature top-down prefrontal systems. Individual differences in emotional reactivity might put some teens at greater risk during this sensitive transition in development.
We examined the association between emotion regulation and frontoamygdala circuitry in 60 children, adolescents, and adults with an emotional go-nogo paradigm. We went beyond examining the magnitude of neural activity and focused on neural adaptation within this circuitry across time with functional magnetic resonance imaging.
Adolescents showed exaggerated amygdala activity relative to children and adults. This age-related difference decreased with repeated exposures to the stimuli, and individual differences in self-ratings of anxiety predicted the extent of adaptation or habituation in amygdala. Individuals with higher trait anxiety showed less habituation over repeated exposures. This failure to habituate was associated with less functional connectivity between ventral prefrontal cortex and amygdala.
These findings suggest that exaggerated emotional reactivity during adolescence might increase the need for top-down control and put individuals with less control at greater risk for poor outcomes.

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    • "The proposition that increased attentional control (via WM training) can impact positively on anxiety symptoms is consistent with a broader literature that has highlighted the role of the PFC in emotional regulation (e.g., Davidson et al., 2000). It also links to related studies that have found a negative association between PFC activation with brain regions linked to fearful responding, including the amygdala (Etkin et al., 2006; Hare et al., 2008). For example, research has demonstrated that adults who report elevated anxiety show reduced ability to utilize attentional processes associated with the PFC (including the Anterior Cingulate Cortex and the lateral PFC) and where this pattern of activation is argued to maintain threat biases in anxiety (Öhman, 2005; reviews by Bishop, 2007). "
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    • "It is of interest that age-related reductions in amygdala activation were observed for reappraisal, but were not associated with general emotional reactivity to aversive social-affective stimuli. This is inconsistent with numerous studies that have reported heightened amygdala activation among adolescents, versus adults, to facial expressions[Gee et al., 2013;Guyer et al., 2008;Hare et al., 2008;Killgore et al., 2001;Monk et al., 2003]and IAPS images[Vasa et al., 2011;Vink et al., 2014]. However, unlike the majority of these studies, we used a paradigm designed to distinguish developmental changes in emotional reactivity from developmental changes in reappraisal. "
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