Fig. 2.

Overview of structural neuroimaging findings in functional neurological disorder (FND) and somatic symptom disorders (SSD; DSM-IV somatization disorder, somatoform pain disorder, and undifferentiated somatoform disorder). Directions of arrows show increases or decreases in regional brain structural measures compared to healthy controls. Several studies found no between group differences. Abbreviations: Anterior cingulate cortex (ACC); Amygdala (AMG); Cerebellum (Cx); Dorsolateral prefrontal cortex (dlPFC); Hippocampal formation (HF); Inferior frontal gyrus (IFG); Lateral occipital complex (LOC); Orbitofrontal cortex (OFC); Parahippocampal gyrus (PHG); Supplementary motor area (SMA); Thalamus (THAL).