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Psychophysically-anchored, Robust Thresholding in Studying Pain-related Lateralization of Oscillatory Prestimulus Activity
Published on: January 21, 2017
Pain perception and its genesis in the human brain
1Center for Higher Brain Functions, Capital Medical University, Beijing 100069, China. ac@ccmu.edu.cn
Sheng Li Xue Bao : [Acta Physiologica Sinica]
|October 30, 2008
Summary
Human brain imaging reveals key areas involved in pain perception, including the thalamus, insular cortex, and somatic areas. These regions activate across various pain types, from physical stimuli to psychological stress.
Area of Science:
- Neuroscience
- Brain Imaging
- Pain Perception Research
Background:
- Pain perception is a complex process involving multiple brain regions.
- Recent decades have seen advancements in neuroimaging techniques for studying pain.
- Understanding the neural basis of pain is crucial for developing effective treatments.
Purpose of the Study:
- To review and synthesize current knowledge on brain activation during pain perception.
- To identify core and secondary brain regions involved in processing nociceptive information.
- To highlight the distinction between pain activation and modulation in the brain.
Main Methods:
- Review of neuroimaging studies utilizing electroencephalography (EEG), magnetoencephalography (MEG), positron emission tomography (PET), and functional magnetic resonance imaging (fMRI).
- Analysis of studies investigating pain activation induced by physical, chemical, psychological, and pathological stimuli.
- Synthesis of findings related to identified brain areas, termed pain representation, matrix, neuraxis, or signature.
Main Results:
- Consistent activation across studies in core brain sites including the thalamus, primary (SI) and secondary (SII) somatic areas, insular cortex (IC), prefrontal cortex (PFC), cingulate, and parietal cortices.
- Identification of additional important areas such as the brainstem, hippocampus, amygdala, and supplementary motor area (SMA).
- Demonstration that while pain processing sites are largely delineated, the functional modes are less explored, with the insular cortex potentially being the initial stage of conscious pain perception.
Conclusions:
- The human brain utilizes a network of interconnected cortical and subcortical regions for pain perception.
- Neuroimaging techniques have significantly advanced our understanding of the spatial distribution of pain processing.
- Further research is needed to elucidate the temporal dynamics and functional modes of brain activity in pain perception, particularly the role of the insular cortex.
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