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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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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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Analgesia and Pain Management01:25

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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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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Factors Affecting Perception01:25

Factors Affecting Perception

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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
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Related Experiment Video

Updated: Aug 23, 2025

Determining heat and mechanical pain threshold in inflamed skin of human subjects
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Why pain hurts.

Irene Tracey1

  • 1Wellcome Centre for Integrative Neuroimaging, FMRIB, Wolfson Building, Nuffield Department of Clinical Neuroscience, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DU, UK; Merton College, University of Oxford, Oxford, OX1 4JD, UK.

Trends in Cognitive Sciences
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Summary
This summary is machine-generated.

Scientists are exploring how the brain represents the core sensation of pain. Understanding this neural basis may unlock new pain relief strategies for acute and chronic pain conditions.

Keywords:
brainhurtneuroimagingpainunpleasantness

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Area of Science:

  • Neuroscience
  • Pain Research
  • Sensory Processing

Background:

  • Significant advancements have been made in understanding the complexities of pain perception.
  • Pain is a multidimensional experience, encompassing both acute and chronic forms.
  • The fundamental subjective experience of pain, 'hurting,' remains a key area of investigation.

Purpose of the Study:

  • To elucidate the neural mechanisms underlying the core component of pain.
  • To identify potential brain targets for effective pain management.
  • To bridge the gap between basic pain science and clinical pain relief.

Main Methods:

  • Utilizing advanced neuroimaging techniques to map pain pathways.
  • Employing psychophysical assessments to quantify pain perception.
  • Investigating neural correlates of the 'hurt' sensation in various pain models.

Main Results:

  • Identifying specific brain regions and neural circuits critical for the core pain experience.
  • Demonstrating a link between neural activity patterns and pain intensity.
  • Providing evidence for the feasibility of targeting identified neural substrates for pain modulation.

Conclusions:

  • The core 'hurt' of pain is represented by distinct neural signatures in the human brain.
  • Targeting these neural representations offers a promising avenue for developing novel analgesics.
  • Further research into brain-pain interactions is crucial for advancing pain relief therapies.