کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10451340 918402 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Brain circuitry underlying pain in response to imagined movement in people with spinal cord injury
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب سلولی و مولکولی
پیش نمایش صفحه اول مقاله
Brain circuitry underlying pain in response to imagined movement in people with spinal cord injury
چکیده انگلیسی
Pain following injury to the nervous system is characterized by changes in sensory processing including pain. Although there are many studies describing pain evoked by peripheral stimulation, we have recently reported that pain can be evoked in subjects with complete spinal cord injury (SCI) during a motor imagery task. In this study, we have used functional magnetic resonance imaging to explore brain sites underlying the expression of this phenomenon. In 9 out of 11 subjects with complete thoracic SCI and below-level neuropathic pain, imagined foot movements either evoked pain in a previously non-painful region or evoked a significant increase in pain within the region of on-going pain (3.2 ± 0.7-5.2 ± 0.8). In both controls (n = 19) and SCI subjects, movement imagery evoked signal increases in the supplementary motor area and cerebellar cortex. In SCI subjects, movement imagery also evoked increases in the left primary motor cortex (MI) and the right superior cerebellar cortex. In addition, in the SCI subjects, the magnitude of activation in the perigenual anterior cingulate cortex and right dorsolateral prefrontal cortex was significantly correlated with absolute increases in pain intensity. These regions expanded to include right and left anterior insula, supplementary motor area and right premotor cortex when percentage change in pain intensity was examined. This study demonstrates that in SCI subjects with neuropathic pain, a cognitive task is able to activate brain circuits involved in pain processing independently of peripheral inputs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: PAIN® - Volume 148, Issue 3, March 2010, Pages 438-445
نویسندگان
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