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Related Concept Videos

Pain01:20

Pain

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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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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...
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Primary Motives: Sleep, Sex, and Pain Avoidance01:24

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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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Nociception01:44

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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.
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Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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Blood and Nerve Supply to the Bones01:29

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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
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Related Experiment Video

Updated: Mar 30, 2026

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
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Sex Differences in Pain.

Edmund Keogh1

  • 1Senior Lecturer in Psychology, University of Bath.

Reviews in Pain
|November 4, 2015
PubMed
Summary
This summary is machine-generated.

Men and women experience pain differently, with women generally reporting more pain and higher prevalence in certain conditions. These sex differences in pain perception are influenced by factors like age and reproductive status.

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Area of Science:

  • Pain perception and sex differences
  • Human physiology and behavior

Background:

  • Growing evidence indicates significant sex differences in pain perception and experience.
  • Women commonly report higher pain levels and greater prevalence in various painful conditions compared to men.
  • These disparities are particularly notable during reproductive years and are often overlooked in research.

Purpose of the Study:

  • To investigate the multifaceted nature of sex differences in pain perception and experience.
  • To highlight the importance of considering sex as a biological variable in pain research.
  • To explore potential underlying mechanisms contributing to observed sex disparities in pain.

Main Methods:

  • Review of existing scientific literature on sex differences in pain.
  • Analysis of prevalence data for various painful conditions across sexes.
  • Exploration of potential biological and behavioral factors influencing pain perception.

Main Results:

  • Women, on average, report more pain than men.
  • Certain painful conditions show a higher prevalence in women.
  • Sex differences in pain are age-dependent, especially during reproductive years.
  • The variable of sex is not consistently investigated in pain studies.

Conclusions:

  • Sex is a critical factor influencing pain perception and experience.
  • Further research is needed to elucidate the mechanisms behind sex differences in pain.
  • Routine investigation of sex in pain studies is essential for accurate understanding and treatment.