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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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Nociception01:44

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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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Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
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Blood and Nerve Supply to the Bones01:29

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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
Nutrient Artery
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Analgesia and Pain Management01:25

Analgesia and Pain Management

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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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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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Related Experiment Video

Updated: Jun 27, 2025

Demonstration of Cutaneous Allodynia in Association with Chronic Pelvic Pain
06:44

Demonstration of Cutaneous Allodynia in Association with Chronic Pelvic Pain

Published on: June 23, 2009

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Meralgia paresthetica.

Colin Chalk1, Dina Namiranian1

  • 1Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada.

Handbook of Clinical Neurology
|May 2, 2024
PubMed
Summary
This summary is machine-generated.

Meralgia paresthetica, a nerve condition causing thigh pain, is often diagnosed by symptoms. While risk factors like obesity exist, effective treatments lack comparative trials.

Keywords:
Inguinal ligamentLateral femoral cutaneous nerveLumbar plexusMeralgia parestheticaNerve anatomyNeurolysis

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Area of Science:

  • Neurology
  • Peripheral Nerve Disorders

Background:

  • Meralgia paresthetica involves lateral femoral cutaneous nerve dysfunction.
  • It presents as sensory disturbance, often painful, on the anterolateral thigh.
  • Diagnosis relies on patient-reported symptoms, normal motor function, and reflexes.

Purpose of the Study:

  • To review the diagnosis, risk factors, and treatment of meralgia paresthetica.
  • To highlight diagnostic challenges and limitations of current electrophysiological tests.
  • To discuss available treatment options and the need for evidence-based comparisons.

Main Methods:

  • Review of clinical presentation and diagnostic criteria.
  • Identification of associated risk factors.
  • Summary of current and potential treatment modalities.

Main Results:

  • Diagnosis is primarily clinical, supported by limited electrophysiological data.
  • Obesity, tight clothing, and diabetes are key risk factors.
  • Some cases arise post-surgery; many are self-limiting, but refractory cases exist.

Conclusions:

  • Meralgia paresthetica requires clinical recognition, with diagnostic support from nerve studies having limitations.
  • Risk factor management is crucial.
  • Further research is needed to compare the efficacy of various treatments for refractory cases.