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Related Concept Videos

Nociception01:44

Nociception

33.4K
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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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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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

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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...
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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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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

3.1K
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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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

1.1K
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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Updated: Feb 24, 2026

Recording Network Activity in Spinal Nociceptive Circuits Using Microelectrode Arrays
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Recording Network Activity in Spinal Nociceptive Circuits Using Microelectrode Arrays

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Nociceptive Circuits: Can't Escape Detection.

Melanie R Chin1, W Daniel Tracey1

  • 1The Gill Center for Biomolecular Science and Department of Biology, Indiana University, Bloomington, Indiana 47405, USA.

Current Biology : CB
|August 23, 2017
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Summary
This summary is machine-generated.

Researchers discovered new neural circuit components controlling pain-like behaviors in fruit fly larvae. This finding advances our understanding of how organisms sense and avoid harmful stimuli.

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Sensory Biology

Background:

  • Organisms utilize nociceptive sensory neurons to detect and evade harmful environmental stimuli.
  • Understanding the neural circuits underlying nociception is crucial for comprehending protective behaviors.

Purpose of the Study:

  • To identify novel downstream neural circuit components involved in nociceptive behavior in Drosophila larvae.
  • To elucidate the neural mechanisms governing the detection and avoidance of damaging stimuli.

Main Methods:

  • Utilized genetic screening and behavioral assays in Drosophila larvae.
  • Employed advanced imaging techniques to visualize neural activity.
  • Performed genetic manipulations to dissect neural circuit function.

Main Results:

  • Identified previously uncharacterized neurons and synapses downstream of nociceptors.
  • Demonstrated that these components are essential for initiating nociceptive avoidance responses.
  • Mapped the flow of information within the identified neural circuit.

Conclusions:

  • The study reveals a new set of neural elements critical for nociceptive behavior in Drosophila.
  • These findings expand our knowledge of sensory processing and motor control in response to noxious stimuli.
  • Provides a foundation for future research into pain perception and avoidance mechanisms.