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Related Concept Videos

Analgesia and Pain Management01:25

Analgesia and Pain Management

Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
Pain01:20

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Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
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Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...
Primary Motives: Sleep, Sex, and Pain Avoidance01:24

Primary Motives: Sleep, Sex, and Pain Avoidance

Primary motives such as sleep, sex, and pain avoidance are crucial drivers of behavior in humans and animals. These motives ensure survival, reproductive success, and overall well-being by prompting actions that meet essential bodily needs.
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Degenerative Disc Disease ll: Pathophysiology01:23

Degenerative Disc Disease ll: Pathophysiology

The symptoms of degenerative disc disease arise from a combination of mechanical compression, vascular compromise, and biochemical inflammation, which together disrupt nerve function and produce pain.Mechanical CompressionDisc degeneration reduces height and elasticity, predisposing to herniation of the nucleus pulposus, a major cause of radicular pain. Herniations may be protrusion (bulging with intact annulus), extrusion (nucleus extends beyond disc but remains connected), or sequestration...
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Related Experiment Video

Updated: Jun 3, 2026

Partial Sciatic Nerve Ligation: A Mouse Model of Chronic Neuropathic Pain to Study the Antinociceptive Effect of Novel Therapies
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Pain mechanisms: a commentary on concepts and issues.

Edward R Perl1

  • 1Department of Cell & Molecular Physiology, University of North Carolina School of Medicine, Chapel Hill, NC 27599-7545, United States. erp@med.unc.edu

Progress in Neurobiology
|March 23, 2011
PubMed
Summary

This commentary traces the historical evolution of concepts regarding neural mechanisms of pain, highlighting how current debates stem from long-standing ideas and recurring theories in pain research.

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Area of Science:

  • Neuroscience
  • Pain Research
  • Somatic Sensation

Background:

  • The concept of pain encompasses a wide range of responses, from simple reflexes to complex behaviors.
  • Understanding the neural basis of pain is crucial for advancing neuroscience and biological mechanisms.

Observation:

  • The historical progression of ideas about pain mechanisms reveals recurring themes and challenges.
  • Current theories of pain often build upon or revisit concepts from the early 19th century onwards.

Findings:

  • The evolution of pain concepts demonstrates that contemporary controversies have deep historical roots.
  • Previously refuted ideas about pain mechanisms can re-emerge, underscoring the importance of historical context.

Implications:

  • Understanding the historical trajectory of pain research provides perspective on current controversies.
  • Recognizing the cyclical nature of scientific ideas can inform future research directions in pain and neuroscience.