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Depression and pain: an overview.

Lana J Williams1, Felice N Jacka1, Julie A Pasco1

  • 11Department of Clinical and Biomedical Sciences: Barwon Health, The University of Melbourne, Victoria, Australia.

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Depression and pain frequently coexist, impacting patient outcomes. Shared biological and psychological mechanisms, alongside overlapping treatments, highlight their interconnectedness.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Pain Medicine

Background:

  • Depression and pain are prevalent, burdensome conditions affecting a significant portion of the population.
  • These conditions frequently co-occur, presenting complex challenges for treatment and patient outcomes.

Purpose of the Study:

  • To conduct a comprehensive literature review on the nature, prevalence, and co-morbidity of depression and pain.
  • To explore the underlying biological and psychological mechanisms linking these conditions.
  • To summarize current treatment options for co-occurring depression and pain.

Main Methods:

  • Literature search of PubMed and Medline databases.
  • Keywords included depression, pain, co-morbidity, biological mechanisms, psychological mechanisms, serotonin (5-HT), norepinephrine (NE), hypothalamic-pituitary-adrenal (HPA) axis, amygdala, functional magnetic resonance imaging (fMRI), antidepressant, and psychological therapy.
  • Review of identified sources to synthesize current information.

Main Results:

  • Depression and pain are common co-morbidities, with pain as a physical symptom affecting approximately 65% of depressed patients.
  • Co-occurring depression impacts pain threshold and tolerance in chronic pain patients, leading to poorer outcomes and increased healthcare use.
  • Biological and psychological studies reveal shared mechanisms, and both antidepressant and psychological therapies show efficacy in treating these linked conditions.

Conclusions:

  • Pain and depression share overlapping phenomenology, neurobiology, and therapeutic targets.
  • The interaction between pain and depression is bidirectional, significantly influencing treatment strategies and patient outcomes.