This review combined data from multiple studies to look at brain activity in people with anxiety disorders versus healthy controls. The researchers focused on resting-state functional connectivity, which measures how different parts of the brain communicate while at rest. The study included 378 patients with anxiety disorders and 405 healthy controls. No specific setting or intervention was reported for this analysis.
The analysis found that connectivity between the amygdala and the anterior cingulate cortex was decreased in patients. In contrast, connections between the amygdala and the left superior temporal gyrus, middle temporal gyrus, and cuneus were increased. These differences suggest distinct patterns of brain communication in anxiety disorders.
The study notes that findings in resting-state functional MRI can be heterogeneous. Because the data comes from a meta-analysis of coordinate-based studies rather than a single primary trial, results are based on voxel-wise tests with corrections to minimize false positives. This work provides a potential primary target for biomarker development and novel interventions. Readers should view these findings as a step toward understanding brain mechanisms rather than a definitive cause of anxiety.