Chapter 11: Anxiety and Obsessive-Compulsive Disorders

The content distinguishes among anxiety, fear, and panic as separate psychological experiences, with anxiety representing a future-focused state of apprehension, fear as an immediate response to perceived threat, and panic as an abrupt physiological reaction occurring without genuine danger. The chapter presents DSM-5 diagnostic criteria for multiple anxiety presentations, including Generalized Anxiety Disorder characterized by persistent worry and physical tension, Separation Anxiety Disorder involving distress at caregiver separation, Specific Phobias focused on circumscribed objects or situations, Social Anxiety Disorder driven by interpersonal evaluation concerns, and Panic Disorder marked by recurrent panic attacks. Obsessive-Compulsive Disorder is detailed as a condition where intrusive thoughts trigger repetitive behaviors designed to temporarily alleviate associated distress, establishing a self-perpetuating maintenance cycle. The neurobiological underpinnings of these conditions involve amygdala hyperactivity, hypothalamic-pituitary-adrenal axis dysregulation, and genetic vulnerability factors that interact with environmental stressors. Cognitive mechanisms include threat interpretation bias, worry rumination loops, and avoidance patterns that paradoxically reinforce anxiety through negative reinforcement. Treatment modalities encompass Cognitive-Behavioral Therapy targeting maladaptive thought patterns, exposure-based interventions systematically reducing avoidance, selective serotonin reuptake inhibitors for neurochemical rebalancing, and family-centered approaches addressing parental factors. Parenting styles, particularly overprotection and modeling of anxious responses, along with adverse childhood experiences contribute significantly to disorder development and maintenance. Early identification and intervention are emphasized as critical for preventing academic, social, and emotional impairment across the developmental trajectory.