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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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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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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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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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Fascia, a thin layer of fibrous connective tissue, is distributed throughout the body. It demarcates and forms a supportive covering over skeletal muscles, bones, blood vessels, and organs. There are three main types of facia— superficial fascia, deep fascia, and subserous fascia. These are all present at different depths in the body. Fascia reduces the friction and permits muscles, joints, and organs to easily slide against each other, facilitating movement of the body and preventing...
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Central sensitivity and fibromyalgia.

Veronica Mezhov1,2, Emma Guymer1,2, Geoffrey Littlejohn1,2

  • 1Department of Medicine, Monash University, Melbourne, Victoria, Australia.

Internal Medicine Journal
|June 17, 2021
PubMed
Summary
This summary is machine-generated.

Fibromyalgia, a condition causing widespread pain and fatigue, is linked to central sensitivity syndromes. Early diagnosis and integrated treatment are key to managing this prevalent disorder and improving patient outcomes.

Keywords:
central nervous system sensitisationcentral sensitivitychronic paindiagnosisdisease managementfibromyalgia

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Area of Science:

  • Rheumatology
  • Neurology
  • Pain Medicine

Background:

  • Fibromyalgia is characterized by widespread pain, fatigue, sleep, and cognitive issues.
  • It frequently overlaps with other central sensitivity syndromes (CSS), including IBS and chronic fatigue syndrome.
  • Central sensitization, involving amplified nervous system processing, is the primary mechanism in these disorders.

Purpose of the Study:

  • To highlight the prevalence and impact of fibromyalgia in chronic diseases.
  • To emphasize the role of central sensitivity as a unifying concept for related disorders.
  • To discuss diagnostic criteria and integrated treatment approaches for fibromyalgia and CSS.

Main Methods:

  • Clinical diagnosis of fibromyalgia after excluding other conditions.
  • Application of diagnostic criteria for identifying fibromyalgia.
  • Review of integrated treatment strategies for central sensitivity.

Main Results:

  • Fibromyalgia is highly prevalent across rheumatic and non-rheumatic chronic diseases, leading to significant morbidity if unrecognized.
  • Diagnostic criteria aid in identifying fibromyalgia, improving management in complex chronic conditions.
  • An integrated treatment approach, including education, exercise, stress reduction, and central nervous system-targeting therapies, is effective.

Conclusions:

  • Central sensitivity provides a framework for understanding fibromyalgia and related syndromes.
  • Accurate diagnosis using established criteria is crucial for effective patient management.
  • Integrated, multimodal treatment strategies are recommended for fibromyalgia and central sensitivity syndromes.