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Related Experiment Videos

[Placebo effect and pain: brain bases].

J M J Ramos1

  • 1Departamento de Psicología Experimental y Fisología del Comportamiento, Facultad de Psicología, Universidad de Granada. jmjramos@ugr.es

Neurologia (Barcelona, Spain)
|February 27, 2007
PubMed
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[Is the hippocampus necessary for spatial learning?].

Revista de neurologia·2002
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The placebo effect in pain relief involves prefrontal cortex activation for pain control. This system then reduces pain signaling in brain regions like the insula and cingulate cortex, mediated by opioids.

Area of Science:

  • Neuroscience
  • Psychology
  • Pharmacology

Context:

  • Pharmacological treatments are influenced by psychosocial factors.
  • The placebo effect demonstrates improvement from simulated treatment due to psychosocial context.
  • Understanding placebo analgesia requires examining its neural underpinnings.

Purpose:

  • To investigate the brain regions and neurochemical mechanisms behind placebo-induced analgesia.
  • To elucidate the neural pathways involved in placebo pain relief.

Summary:

  • Functional neuroimaging reveals increased dorsolateral and orbitofrontal prefrontal cortex activity during placebo analgesia, suggesting a role in cognitive pain control.
  • Placebo administration leads to reduced activity in the anterior insula and rostral cingulate cortex during nociceptive stimulation.

Related Experiment Videos

  • Opioid release appears to mediate the attenuation of pain processing in these key cortical regions.

    • Impact:

    • Identifies distinct cerebral systems, a prefrontal guiding mechanism and downstream cortical regions, working in concert for placebo analgesia.
    • Highlights the brain's capacity to modulate pain perception through expectation and psychosocial context.
    • Provides insights into the neurobiological basis of placebo effects, relevant for pain management strategies.