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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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Spinal Cord: Information Processing01:10

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The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
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Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...
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Skeletal muscle relaxants are a group of drugs that can reduce muscle stiffness and induce temporary paralysis to relieve pain. These agents can act centrally to reduce muscle tone or spasms in painful conditions such as multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), or spinal injuries; they are called antispasmodics or spasmolytics.
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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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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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Related Experiment Video

Updated: Aug 27, 2025

Measuring Spinal Presynaptic Inhibition in Mice By Dorsal Root Potential Recording In Vivo
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Pain modulation in the spinal cord.

Clifford J Woolf1

  • 1FM Kirby Neurobiology Center, Boston Children's Hospital and Department of Neurobiology, Harvard Medical School, Boston, MA, United States.

Frontiers in Pain Research (Lausanne, Switzerland)
|September 30, 2022
PubMed
Summary
This summary is machine-generated.

The spinal cord actively processes sensory information, influencing pain perception and behavior. New discoveries necessitate a more complex model of spinal sensory modulation beyond the original Gate Control theory.

Keywords:
gate control theoryinhibitionpainpresynapticspinal cord

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Area of Science:

  • Neuroscience
  • Somatosensory System Research
  • Pain Processing

Background:

  • Sensory input from the periphery is complex, encoding stimulus features like nature, location, intensity, and duration.
  • Sensory afferents convert stimulus features into action potential firing patterns.
  • Spinal cord processing and modulation of sensory input determine perceptual and behavioral outcomes.

Purpose of the Study:

  • To acknowledge the historical significance of the Spinal Cord Gate Control theory.
  • To propose an updated model of spinal sensory modulation incorporating recent advancements.
  • To enhance understanding of pain processing and its clinical implications.

Main Methods:

  • Review and synthesis of current research on somatosensory system function.
  • Analysis of the limitations of existing models in light of new discoveries.
  • Conceptual framework development for a more comprehensive model.

Main Results:

  • The Spinal Cord Gate Control theory provided foundational insights into pain modulation.
  • Significant progress in understanding the somatosensory system has been achieved.
  • Existing models may not fully capture the complexity of spinal sensory processing.

Conclusions:

  • A more complex and accurate model of spinal sensory modulation is needed.
  • Integrating new findings will refine our understanding of pain perception.
  • This updated model will support the development of improved clinical interventions.