Representation of Spatial Information in Key Areas of the Descending Pain Modulatory System
| Autor: | Christoph Ritter, Martin N. Hebart, Thomas Wolbers, Ulrike Bingel |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Nociception
Pain Threshold Adult Male Time Factors Brain activity and meditation Medizin Pain Stimulation physiopathology [Brain] innervation [Leg] Brain mapping Periaqueductal gray Functional Laterality blood supply [Brain] innervation [Arm] Young Adult Neuroimaging Neural Pathways medicine Humans ddc:610 Anterior cingulate cortex Pain Measurement Leg Brain Mapping medicine.diagnostic_test General Neuroscience physiopathology [Neural Pathways] blood supply [Neural Pathways] Brain physiopathology [Pain] pathology [Pain] Healthy Volunteers medicine.anatomical_structure Arm Female physiology [Nociception] Cues Brief Communications physiology [Pain Threshold] Psychology Functional magnetic resonance imaging Neuroscience |
| Zdroj: | The journal of neuroscience 34(13), 4634-4639 (2014). doi:10.1523/JNEUROSCI.4342-13.2014 |
| ISSN: | 1529-2401 0270-6474 |
| DOI: | 10.1523/jneurosci.4342-13.2014 |
| Popis: | Behavioral studies have demonstrated that descending pain modulation can be spatially specific, as is evident in placebo analgesia, which can be limited to the location at which pain relief is expected. This suggests that higher-order cortical structures of the descending pain modulatory system carry spatial information about the site of stimulation. Here, we used functional magnetic resonance imaging and multivariate pattern analysis in 15 healthy human volunteers to test whether spatial information of painful stimuli is represented in areas of the descending pain modulatory system. We show that the site of nociceptive stimulation (arm or leg) can be successfully decoded from local patterns of brain activity during the anticipation and receipt of painful stimulation in the rostral anterior cingulate cortex, the dorsolateral prefrontal cortices, and the contralateral parietal operculum. These results demonstrate that information regarding the site of nociceptive stimulation is represented in these brain regions. Attempts to predict arm and leg stimulation from the periaqueductal gray, control regions (e.g., white matter) or the control time interval in the intertrial phase did not allow for classifications above chance level. This finding represents an important conceptual advance in the understanding of endogenous pain control mechanisms by bridging the gap between previous behavioral and neuroimaging studies, suggesting a spatial specificity of endogenous pain control. |
| Databáze: | OpenAIRE |
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