No abstract

Recent advances in the developmental epidemiology, neurobiology and treatment of pediatric anxiety disorders have increased our understanding of these conditions and herald improved outcomes for affected children and adolescents. This article reviews the current epidemiology, longitudinal trajectory, and neurobiology of anxiety disorders in youth. Additionally, we summarize the current evidence for both psychotherapeutic and psychopharmacologic treatments of fear-based anxiety disorders (e.g., generalized, social and separation anxiety disorders) in children and adolescents. Current data suggest that these disorders begin in childhood and adolescence, exhibit homotypic continuity and increase the risk of secondary anxiety and mood disorders. Psychopharmacologic trials involving selective serotonin reuptake inhibitors (SSRIs) and selective serotonin norepinephrine reuptake inhibitors (SSNRIs) are effective in pediatric patients with anxiety disorders and have generally demonstrated moderate effect sizes. Additionally, current data support cognitive-behavioral therapy (CBT) are efficacious in the treatment of these conditions in youth and that combination of CBT + an SSRI may be associated with greater improvement than would be expected with either treatment as monotherapy.

Neuroimaging has shown promise as a tool to predict likelihood of treatment response in adult anxiety disorders, with potential implications for clinical decision-making. Despite the relatively high prevalence and emergence of anxiety disorders in youth, very little work has evaluated neural predictors of response to treatment. The goal of the current study was to examine brain function during emotional face processing as a predictor of response to treatment in children and adolescents (age 7-19 years; N = 41) with generalized, social, and/ or separation anxiety disorder. Prior to beginning treatment with the selective serotonin reuptake inhibitor (SSRI) sertraline or cognitive behavior therapy (CBT), participants completed an emotional faces matching task during functional magnetic resonance imaging (fMRI). Whole brain responses to threatening (ie, angry and fearful) and happy faces were examined as predictors of change in anxiety severity following treatment. Greater activation in inferior and superior frontal gyri, including dorsolateral prefrontal cortex and ventrolateral prefrontal cortex, as well as precentral/postcentral gyri during processing of threatening faces predicted greater response to CBT and SSRI treatment. For processing of happy faces, activation in postcentral gyrus was a significant predictor of treatment response. Post-hoc analyses indicated that effects were not significantly moderated by type of treatment. Findings suggest that greater activation in prefrontal regions involved in appraising and regulating responses to social signals of threat predict better response to SSRI and CBT treatment in anxious youth and that neuroimaging may be a useful tool for predicting how youth will respond to treatment.

This article reviews the current screening and assessment tools for anxiety disorders in children and adolescents, as well as evidence-based treatment interventions for these disorders. The following anxiety disorders are discussed: separation anxiety disorder, generalized anxiety disorder, specific phobia, panic disorder, social anxiety disorder (social phobia), and selective mutism. There are several well-studied screening and assessment tools to identify childhood anxiety disorders early and differentiate the various anxiety disorders. Evaluations of baseline somatic symptoms, severity, and impairment ratings of the anxiety disorders, and collecting ratings from several sources is clinically helpful in assessment and treatment follow-up. Cognitive-behavioral therapy (CBT) has been extensively studied and has shown good efficacy in treatment of childhood anxiety disorders. A combination of CBT and medication may be required for moderate to severely impairing anxiety disorders and may improve functioning better than either intervention alone. Selective serotonin reuptake inhibitors are currently the only medications that have consistently shown efficacy in treatment of anxiety disorders in children and adolescents. Despite proven efficacy, the availability of CBT in the community is limited. Current research is focusing on early identification of anxiety disorders in community settings, increasing the availability of evidence-based interventions, and modification of interventions for specific populations.

Although cognitive-behavioral psychotherapy (CBT) and pharmacotherapy are evidence-based treatments for pediatric anxiety, many youth with anxiety disorders fail to respond to these treatments. Given limitations of clinical measures in predicting treatment response, identifying neural predictors is timely. In this study, 35 anxious youth (ages 7–19 years) completed an emotional face-matching task during which the late positive potential (LPP), an event-related potential (ERP) component that indexes sustained attention towards emotional stimuli, was measured. Following the ERP measurement, youth received CBT or selective serotonin reuptake inhibitor (SSRI) treatment, and the LPP was examined as a predictor of treatment response. Findings indicated that, accounting for pre-treatment anxiety severity, neural reactivity to emotional faces predicted anxiety severity post-CBT and SSRI treatment such that enhanced electrocortical response to angry faces was associated with better treatment response. An enhanced LPP to angry faces may predict treatment response insofar as it may reflect greater emotion dysregulation or less avoidance and/or enhanced engagement with environmental stimuli in general, including with treatment.