Generalized Anxiety Disorder
Generalized anxiety disorder (GAD) is an anxiety disorder characterized by excessive anxiety or worry on most days for at least six months. The anxiety or worry can relate to various aspects of life — such as personal health, work, social interactions, and everyday circumstances — and can cause significant problems in day-to-day functioning. Learn more about generalized anxiety disorder.
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Featured studies include only those currently recruiting participants. Studies with the most recent start date appear first.
Start Date: December 31, 2016
Location: Ann Arbor, Michigan
Eligibility: Ages 7–17, Accepts Healthy Volunteers
Anxiety is among the most prevalent, costly and disabling illnesses and tends emerge early in childhood. Cognitive behavioral therapy (CBT) is the first-line treatment for early life anxiety, but as many as 40% of young patients who receive CBT fail to get better. The proposed study will examine brain changes marking positive response to CBT for anxiety and how these changes may differ in children compared adolescents. By helping us to understand how CBT works, this study will pave the way for new treatments to stop anxiety early.
Start Date: June 30, 2016
Location: Tulsa, Oklahoma
Eligibility: Ages 18–55, Does Not Accept Healthy Volunteers
This project aims to identify brain and behavioral characteristics of individuals experiencing symptoms of generalized anxiety disorder that will predict the effectiveness of Exposure-based therapy versus Behavioral Activation Therapy. Brain imaging aspects of the study will use functional magnetic resonance imaging (fMRI) and electroencephalography (EEG). Behavioral assessments will include self-report questionnaires, computer-based and observational tasks, and interviews. Assessments will focus on how individuals process positive information (such as reward) and negative information (such as distressing images), as well as how people make decisions. These assessments will be conducted across 2-3 in-person sessions prior to beginning the treatment, and will be repeated across 2-3 in-person sessions after completing treatment. A blood draw will also be conducted pre- and post- treatment. Both the Exposure-based and Behavior Activation therapy will consist of 10, 90-minute weekly therapy sessions conducted in small groups.
Start Date: October 31, 2015
Location: Tulsa, Oklahoma
Eligibility: Ages 18–55, Accepts Healthy Volunteers
This study aims to identify the brain regions responsible for encoding cardiorespiratory 'interoceptive' sensations and determine whether they are dysfunctional in individuals affected by eating disorders, anxiety, depression, or brain injury. By evaluating the same interoceptive sensations across different human illnesses, the investigators hope to provide convergent evidence resulting in identification of core underlying neural processes, and to discern relative contributions in each condition.
Start Date: February 27, 2003
Location: Bethesda, Maryland
Eligibility: Ages 18–50, Accepts Healthy Volunteers
Fear and anxiety are normal responses to a threat. However, anxiety is considered abnormal when the response to the threat is excessive or inappropriate. This study will examine changes in the body and brain that occur during unpleasant learning experiences in healthy volunteers with high, moderate, and low levels of anxiety.
A high degree of generalized anxiety is a component of many anxiety disorders and is regarded as a marker of vulnerability for these disorders. People with anxiety disorders and individuals with high degrees of anxiety have inappropriate expectations of unpleasant events. This study will investigate the development of expecting unpleasant events in healthy volunteers with varying degrees of anxiety using aversive conditioning models. A later phase of the study will enroll participants with anxiety disorders and compare their responses to those of healthy volunteers.
Patients who meet criteria for an anxiety disorder, and healthy volunteers who have no history of psychiatric or major medical illness will be enrolled in this study. Volunteers will come to the NIH Clinical Center three times for outpatient testing.