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Descending Control Mechanisms and Chronic Pain

  • QiLiang Chen
  • Mary M. HeinricherEmail author
Chronic Pain (R Staud, Section Editor)
Part of the following topical collections:
  1. Topical Collection on Chronic Pain

Abstract

Purpose of Review

The goal of the review was to highlight recent advances in our understanding of descending pain-modulating systems and how these contribute to persistent pain states, with an emphasis on the current state of knowledge around “bottom-up” (sensory) and “top-down” (higher structures mediating cognitive and emotional processing) influences on pain-modulating circuits.

Recent Findings

The connectivity, physiology, and function of these systems have been characterized extensively over the last 30 years. The field is now beginning to ask how and when these systems are engaged to modulate pain. A recent focus is on the parabrachial complex, now recognized as the major relay of nociceptive information to pain-modulating circuits, and plasticity in this circuit and its connections to the RVM is marked in persistent inflammatory pain. Top-down influences from higher structures, including hypothalamus, amygdala, and medial prefrontal areas, are also considered.

Summary

The challenge will be to tease out mechanisms through which a particular behavioral context engages distinct circuits to enhance or suppress pain, and to understand how these mechanisms contribute to chronic pain.

Keywords

Pain modulation Brainstem Persistent pain Inflammation Hypersensitivity 

Notes

Compliance with Ethical Standards

Conflict of Interest

MMH is supported by grants from the National Institutes of Health (NS098660, DA042565, AA025024).

Human and Animal Rights and Informed Consent

This article does not contain any studies with human or animal subjects performed by any of the authors.

References

Papers of particular interest, published recently, have been highlighted as: • Of importance •• Of major importance

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Authors and Affiliations

  1. 1.Department of SurgeryStanford UniversityStanfordUSA
  2. 2.Department of Neurological SurgeryOregon Health & Science UniversityPortlandUSA
  3. 3.Department of Behavioral NeuroscienceOregon Health & Science UniversityPortlandUSA

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