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Right Hemispheric Neuronal Dysfunction in Cancer Pain: A Resting-State fMRI Exploratory Study.

Danghan Xu1, Zhaoxi Liu2, Zexia Wu3

  • 1Huazhou Street Community Health Service Center, Haizhu District, Guangzhou, Guangzhou, 510405, People's Republic of China.

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Cancer pain alters brain activity, particularly in the right hemisphere. Resting-state functional magnetic resonance imaging (fMRI) revealed reduced neural activity and connectivity in key brain regions, suggesting neuroplastic changes.

Keywords:
cancer paincross-sectional studyfMRInegative emotion

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Area of Science:

  • Neuroscience
  • Oncology
  • Radiology

Background:

  • Cancer pain involves complex neurobiological mechanisms.
  • Understanding these mechanisms is crucial for effective pain management.
  • Neuroimaging offers potential for objective assessment.

Purpose of the Study:

  • To investigate neurobiological mechanisms of cancer pain using resting-state functional magnetic resonance imaging (fMRI).
  • To characterize neural network changes in cancer pain patients.
  • To identify potential neuroimaging biomarkers for cancer pain.

Main Methods:

  • Cross-sectional study comparing 20 cancer pain patients with 20 healthy controls.
  • Utilized 3.0T resting-state fMRI to analyze functional connectivity and low-frequency amplitude.
  • Focused analysis on the right nucleus accumbens as a seed region.

Main Results:

  • Observed significant neuroplastic changes primarily in the right hemisphere of cancer pain patients.
  • Reduced spontaneous neural activity in the right medial prefrontal cortex, superior/middle frontal gyrus, and precuneus.
  • Decreased functional connectivity between the right nucleus accumbens and bilateral medial prefrontal cortex, left temporal pole, and right superior temporal gyrus.

Conclusions:

  • Preliminary evidence suggests right hemispheric neuronal dysfunction in cancer pain.
  • Altered functional connectivity impacts emotion regulation and pain processing circuits.
  • Findings provide insights into cancer pain mechanisms and potential objective assessment tools.