Individual differences in pain sensitivity in drug-naive patients with major depressive disorder: an fMRI study
| Autor: | Guohui Jiang, Jixin Liu, Juan Tan, Na Yong, Lei Tang, Shaoyue He, Qianmei Hou, Ding Xianghong, Chen Wang, Xiaoming Wang, Changyue Hou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Visual analogue scale Cognitive Neuroscience Individuality Pain Stimulation 050105 experimental psychology 03 medical and health sciences Behavioral Neuroscience Cellular and Molecular Neuroscience 0302 clinical medicine Thermal stimulation Internal medicine Healthy control Hamd medicine Humans 0501 psychology and cognitive sciences Radiology Nuclear Medicine and imaging Brain Mapping Depressive Disorder Major business.industry 05 social sciences Neuropsychology medicine.disease Magnetic Resonance Imaging Psychiatry and Mental health Drug-naïve Neurology Pharmaceutical Preparations Major depressive disorder Neurology (clinical) business 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Brain imaging and behavior. 15(3) |
| ISSN: | 1931-7565 |
| Popis: | Patients with major depressive disorder (MDD) often report pain; however, the pain-related brain mechanism that contributes to MDD with pain remains largely unclear. In the current study, we aimed to observe the cortical responses by employing fMRI technique combined with thermal stimulation paradigm in 17 major depressive disorder patients with pain (MDDP), 19 major depressive disorder patients without pain (MDDNP), and 25 age- and gender-matched healthy control (HC) subjects. Participants completed the Hamilton Depression Rating Scale-17 (HAMD-17) and provided pain intensity ratings in response to noxious heat (51 °C) during task-fMRI scanning by visual analogue scale (VAS). In our results, there was no difference in pain intensity ratings during tonic heat stimulation between the HC group and MDDNP group (p 0.05), while the MDDNP group had significantly higher HAMD scores compared with the HC group (p 0.001). The MDDNP group had decreased brain activation in the postcentral gyrus (PCG) compared with the HC group, implying abnormal activation of the PCG may associate with the characterized depressive mood of painless MDD (p 0.05). Additionally, there was no difference in HAMD scores between the MDDP group and MDDNP group (p 0.05), while the MDDP group had significantly greater pain during tonic heat stimulation compared with the MDDNP group (p 0.01). The MDDP group showed enhanced activation in the PCG compared with the MDDNP group (p 0.05), which may relate to the abnormal regulation of pain in painful MDD. Our results suggested that higher PCG activation may play an important role in facilitating the occurrence of pain in depression. |
| Databáze: | OpenAIRE |
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