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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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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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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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Related Experiment Video

Updated: Mar 21, 2026

Psychophysically-anchored, Robust Thresholding in Studying Pain-related Lateralization of Oscillatory Prestimulus Activity
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Prestimulus Theta Oscillations and Connectivity Modulate Pain Perception.

Philipp Taesler1, Michael Rose2

  • 1Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg 20248, Germany p.taesler@uke.de.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 6, 2016
PubMed
Summary

Brain activity before pain onset predicts pain perception. Specific theta and gamma band EEG patterns and connectivity changes in the brain correlate with how intensely individuals feel pain, aiding pain management.

Keywords:
EEGpainprestimuluspsychophysicstheta-bandthreshold

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Pain Research

Background:

  • Pain perception is influenced by cognitive factors like expectations.
  • Ongoing brain activity fluctuations may impact pain processing.
  • Individual pain sensitivity varies, necessitating objective measures.

Purpose of the Study:

  • Identify prestimulus electroencephalography (EEG) activity and connectivity patterns related to subsequent pain perception.
  • Investigate neural correlates of subjective pain intensity.
  • Explore potential biomarkers for pain sensitivity.

Main Methods:

  • Used a 64-channel EEG during constant painful and non-painful stimulation at individual thresholds.
  • Employed psychophysical QUEST method for threshold determination.
  • Analyzed theta-band (4-7 Hz) and gamma-band (28-32 Hz) power and connectivity.

Main Results:

  • Decreased theta-band power at T7/FT7 and increased theta-power at T8/FT8 before painful stimuli.
  • Increased gamma-band power at frontocentral sites.
  • Lowered frontolateral theta-band and frontoparietal gamma-band connectivity for painful percepts.
  • EEG signals at T7 (theta) and F1 (gamma) predicted pain perception.

Conclusions:

  • Prestimulus EEG activity and connectivity patterns reflect and predict subsequent pain perception.
  • Findings suggest top-down modulation of pain sensitivity by frontocentral networks.
  • These insights are relevant for clinical diagnostics and pain management strategies.