Table 1.
Studies included in the analysis. Type of disorder as indicated in the original publication.
| Citation | Type of disorder | Number of participants | Imaging method | Task |
|---|---|---|---|---|
| de Greck et al. (2011) | Somatoform disorder | P:20 (12f); HC: 20 (12f) | MRI (1.5T) | Monetary reward task |
| de Greck et al. (2012) | Somatoform disorder | P:20 (12f); HC: 20 (12f) | MRI (1.5T) | Emotional empathy |
| Gündel et al. (2008) | Somatoform pain disorder | P:12 (12f); HC: 20 (13f) | MRI (1.5T) | Noxious heat stimuli |
| Egloff et al. (2009) | Chronic pain, not explained by peripheral tissue damage | P: 11 (6f); HC: 12 (6f) | PET | Glucose metabolism resting state |
| Song et al. (2015) | Somatization disorder | P: 25 (21f); HC: 28 (22) | MRI (3.0T) | Resting state (ReHo) |
| Stoeter et al. (2007) | Somatoform pain disorder | P:17 (11f); HC: 17 (11f) | MRI (1.5T) | Pin-prick stimulation, emotional and cognitive stress |
| Su et al. (2014) | Somatization disorder | P: 25 (21f); HC: 28 (22) | MRI (3.0T) | Resting state (fALFF) |
| Valet et al. (2009) | Pain disorder, without any somatic cause | P:14 (14f); HC: 14 (14f) | MRI (1.5T) | VBM structural scan |
| Yoshino et al. (2014) | Somatoform pain disorder | P: 9 (4); HC: 20 (13) | MRI (1.5T) | Resting state (ReHo) |
| Zhang et al. (2015) | Somatization disorder | P: 25 (21f); HC: 28 (22) | MRI (3.0T) | DTI structural scan |
P: patients; HC: healthy controls; T: Tesla; fMRI: magnetic resonance tomography; PET: positron emission tomography; f: number of females; ReHo: regional homogeneity; fALFF: fractional amplitude of low-frequency fluctuations.