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Related Concept Videos

Nociception01:44

Nociception

28.1K
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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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

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Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
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Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

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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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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

5.2K
The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
5.2K
Pain01:20

Pain

526
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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Related Experiment Video

Updated: Jul 31, 2025

Teasing Out the Interplay Between Natural Killer Cells and Nociceptor Neurons
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Teasing Out the Interplay Between Natural Killer Cells and Nociceptor Neurons

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Decoding nociceptor-DC dialogues.

Theo Crosson1, Sebastien Talbot2

  • 1Department of Pharmacology and Physiology, Université de Montréal, Montreal, QC, Canada.

Immunity
|May 10, 2023
PubMed
Summary
This summary is machine-generated.

Nerve cells called nociceptors attract immune cells (dendritic cells) using CCL2 and CGRP. This creates a neuroimmune defense system that enhances immune coordination and acts as an early warning signal.

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Area of Science:

  • Neuroscience
  • Immunology
  • Physiology

Background:

  • Neuro-immune interactions are crucial for host defense.
  • Nociceptors, involved in pain perception, play a role in physiological and immune responses.
  • Dendritic cells (DCs) are key immune cells coordinating inflammatory responses.

Purpose of the Study:

  • To investigate the role of nociceptors in initiating and modulating immune responses.
  • To elucidate the mechanisms by which nociceptors interact with dendritic cells.
  • To understand the formation and function of neuroimmune units in host defense.

Main Methods:

  • Investigated the interaction between nociceptors and dendritic cells (DCs).
  • Examined the role of chemokine (C-C motif) ligand 2 (CCL2) in attracting DCs.
  • Studied the effect of calcitonin gene-related peptide (CGRP) on DC programming and inflammatory responses.

Main Results:

  • Nociceptors attract DCs via CCL2.
  • Nociceptors initiate a 'sentinel' DC program using CGRP.
  • Direct connections between nociceptors and DCs enhance DC inflammatory responses.

Conclusions:

  • Neuroimmune units formed by nociceptors and DCs act as an advanced warning system.
  • These units integrate rapid nociceptor signaling with DC immune coordination.
  • This interaction enhances host defense mechanisms through a coordinated neuroimmune response.