Pain
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Somatosensory information is delivered to neuronal networks of the dorsal horn (DH) of the spinal cord by the axons of primary afferent neurons that encode the intensity of peripheral sensory stimuli under the form of a code based on the frequency of action potential firing. The efficient processing of these messages within the DH involves frequency-tuned synapses, a phenomenon linked to their ability to display activity-dependent forms of short-term plasticity (STP). ⋯ The STP properties of DH inhibitory synapses might also, at least in part, participate in the pain-relieving effect of nonpharmacological analgesic procedures, such as transcutaneous electrical nerve stimulation, electroacupuncture, or spinal cord stimulation. The properties of target-specific STP at inhibitory DH synapses and their possible contribution to electrical stimulation-induced reduction of hyperalgesic and allodynic states in chronic pain will be reviewed and discussed.
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This article highlights advances in basic science preclinical pain research, clinical research, and psychological research occurring over the 50 years since the International Association for the Study of Pain was founded. It presents important findings and key trends in these 3 areas of pain science: basic science preclinical research, clinical research, and psychological research.
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Supporting its young members has been a key priority of the International Association for the Study of Pain (IASP) for the past 5 decades. The IASP, along with its federations, chapters, and special interest groups, has provided benefits to its trainee and early career members for their career development. This article summarizes various key IASP initiatives and benefits offered to IASP members and how these benefits have positively impacted their careers, including examples from the authors of this article. Suggestions are made for future directions that the IASP could implement to enhance the value provided to its trainee and early career members, which will in turn contribute to IASP achieving its mission to stimulate and support the study of pain and to translate that knowledge into improved pain relief worldwide.
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The decades since the inauguration of the International Association for the Study of Pain have witnessed major advances in scientific concepts (such as the biopsychosocial model and chronic primary pain as a disease in its own right) and in new technologies and approaches (from molecular biology to brain imaging) that have inspired innovations in pain research. These have guided progress in pain management and education about pain for healthcare professionals, the general public, and administrative agencies.
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Since it was founded, the International Association for the Study of Pain (IASP) has been at the forefront of improving pain research, education, and effective pain management in both developed and developing countries. As IASP activities progressed, major differences between the practice of pain management, education, and research in developed countries compared with developing countries were identified. This led to areas of focus by IASP that included pain education to address poor knowledge of pain assessment and treatment, prioritization of pain management by governments and official national legislation and programs, and availability of pain treatments (especially potent analgesics). ⋯ Many IASP chapters in developing countries have established collaborations with groups from developed countries, whereas IASP also implemented other innovative approaches including the developing countries working group, educational grants, pain camps, and multidisciplinary pain hubs with toolkits to develop pain experts for regions in the developing world. Thus, the influence of IASP in many developing countries has had a multiplier effect on the progress made in effective pain management, education, and research. Nonetheless, challenges remain and include better integration of pain management, education, and research in national health systems and academic programs for health professionals.