An fMRI Study Exploring the Overlap and Differences between Neural Representations of Physical and Recalled Pain

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Merle Fairhurst - , University of Oxford, Max Planck Institute for Human Cognitive and Brain Sciences (Author)
  • Katherine Fairhurst - , University of Oxford (Author)
  • Chantal Berna - , University of Oxford (Author)
  • Irene Tracey - , University of Oxford (Author)

Abstract

Implementing a recall paradigm without hypnosis, we use functional MRI (fMRI) to explore and compare nociceptive and centrally-driven pain experiences. We posit that a trace of a recent nociceptive event can be used to create sensory-re-experiencing of pain that can be qualified in terms of intensity and vividness. Fifteen healthy volunteers received three levels of thermal stimuli (warm, low pain and high pain) and subsequently were asked to recall and then rate this experience. Neuroimaging results reveal that recalling a previous sensory experience activates an extensive network of classical pain processing structures except the contralateral posterior insular cortex. Nociceptive-specific activation of this structure and the rated intensity difference between physical and recalled pain events allow us to investigate the link between the quality of the original nociceptive stimulus and the mental trace, as well as the differences between the accompanying neural responses. Additionally, by incorporating the behavioural ratings, we explored which brain regions were separately responsible for generating either an accurate or vivid recall of the physical experience. Together, these observations further our understanding of centrally-mediated pain experiences and pain memory as well as the potential relevance of these factors in the maintenance of chronic pain.

Details

Original languageEnglish
Article numbere48711
JournalPloS one
Volume7
Issue number10
Publication statusPublished - 31 Oct 2012
Peer-reviewedYes
Externally publishedYes

External IDs

PubMed 23119093
ORCID /0000-0001-6540-5891/work/150883498

Keywords

ASJC Scopus subject areas