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Related Concept Videos

Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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 posterior columns...
Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

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...
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

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...
Nociception01:44

Nociception

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. Thus, pain helps the...
Direct Motor Pathways01:11

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...

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Related Experiment Video

Updated: May 24, 2026

Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
10:05

Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia

Published on: January 27, 2018

Nociceptive pathway function is normal in cervical dystonia: a study using laser-evoked potentials.

Michele Tinazzi1, Massimiliano Valeriani, Giovanna Squintani

  • 1Dipartimento di Scienze Neurologiche, Neuropsicologiche, Morfologiche e Motorie, Università di Verona, 37100, Verona, Italy. michele.tinazzi@ospedaleuniverona.it

Journal of Neurology
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Cervical dystonia (CD) pain is not linked to central sensitization. This study found normal laser-evoked potentials (LEPs) and pain ratings in CD patients, indicating typical nociceptive pathway function.

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Simultaneous Recordings of Cortical Local Field Potentials and Electrocorticograms in Response to Nociceptive Laser Stimuli from Freely Moving Rats
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Simultaneous Recordings of Cortical Local Field Potentials and Electrocorticograms in Response to Nociceptive Laser Stimuli from Freely Moving Rats

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Open-Source Real-Time Closed-Loop Electrical Threshold Tracking for Translational Pain Research
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Open-Source Real-Time Closed-Loop Electrical Threshold Tracking for Translational Pain Research

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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
10:05

Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia

Published on: January 27, 2018

Simultaneous Recordings of Cortical Local Field Potentials and Electrocorticograms in Response to Nociceptive Laser Stimuli from Freely Moving Rats
07:52

Simultaneous Recordings of Cortical Local Field Potentials and Electrocorticograms in Response to Nociceptive Laser Stimuli from Freely Moving Rats

Published on: January 7, 2019

Open-Source Real-Time Closed-Loop Electrical Threshold Tracking for Translational Pain Research
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Open-Source Real-Time Closed-Loop Electrical Threshold Tracking for Translational Pain Research

Published on: April 21, 2023

Area of Science:

  • Neuroscience
  • Pain Research
  • Neurology

Background:

  • Cervical dystonia (CD) frequently involves neck muscle pain, but the underlying pain mechanisms remain unclear.
  • Understanding pain pathways in CD is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate laser pain ratings and CO(2) laser-evoked potentials (LEPs) in cervical dystonia patients experiencing posterior neck pain.
  • To determine if central sensitization of nociceptive pathways contributes to pain in CD.

Main Methods:

  • Assessed N2/P2 LEP complex and laser pain ratings in 20 CD patients and 21 healthy controls.
  • Stimulated skin overlying deltoid (painless, non-dystonic) and splenius capitis muscles (painful/dystonic and contralateral painless/non-dystonic) in CD patients.

Main Results:

  • No significant differences in N2/P2 LEP amplitude or laser pain ratings were observed between CD patients and controls.
  • Stimulation of painful, dystonic muscles in CD patients yielded results comparable to painless areas and controls.

Conclusions:

  • Cutaneous nociceptive pathway function is normal in cervical dystonia patients.
  • Muscle pain in CD is not associated with central sensitization of nociceptive inputs in either affected or unaffected body areas.