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Related Concept Videos

Analgesia and Pain Management01:25

Analgesia and Pain Management

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...
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...
Toxidromes: Clinical Features01:30

Toxidromes: Clinical Features

Toxidromes are specific patterns of symptoms resulting from toxic substance exposure. They help in the identification and treatment of poisoning. The symptoms of each toxidrome group indicate poisoning by a certain class of chemicals or drugs.1. Sympathomimetic: Stimulates the sympathetic nervous system. Symptoms include agitation, increased heart rate (HR), blood pressure (BP), respiratory rate (RR), temperature, and pupil size. Drugs like cocaine and amphetamines, along with tremors and...
Cholinergic Receptors: Muscarinic01:25

Cholinergic Receptors: Muscarinic

The pharmacological actions of acetylcholine are elicited via its binding to two families of cholinergic receptors or cholinoceptors, namely, muscarinic and nicotinic receptors. Muscarinic receptors are G protein-coupled receptors and have five subtypes, M1–M5. All mAChR subtypes are activated by acetylcholine and blocked by the antagonist, atropine. 
The subtypes M1, M3, and M5 couple with the Gq subunit and activate the phospholipase C (PLC) activity, mobilizing intracellular Ca2+. Activation...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
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Related Experiment Video

Updated: May 21, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Allodynia and migraine.

Marco Aguggia1

  • 1Neurological Department, C. Massaja Hospital, Via Conte Verde 200, 10141 Asti, Italy. aguggiamarco@tiscali.it

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|May 31, 2012
PubMed
Summary

Migraine attacks involve impaired brainstem sensory processing, leading to central nervous system sensitization. This heightened sensitivity, particularly in the caudal trigeminal nucleus, contributes to allodynia and increased patient disability.

Area of Science:

  • Neuroscience
  • Migraine Pathophysiology
  • Pain Processing

Background:

  • Impaired processing of sensory afferents in the brainstem is crucial for migraine development.
  • Sensitization, a prolonged increase in neuronal excitability, occurs in central nervous system nociceptive pathways.
  • The caudal trigeminal nucleus is specifically implicated in this sensitization process.

Purpose of the Study:

  • To elucidate the role of brainstem sensory processing in migraine pathogenesis.
  • To understand the mechanisms underlying sensitization in the caudal trigeminal nucleus.
  • To highlight the clinical significance of allodynia in migraine management.

Main Methods:

  • The study focuses on the neurobiological mechanisms of migraine.
  • It examines the phenomenon of central sensitization in nociceptive pathways.

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  • Clinical observations regarding allodynia in migraine patients are considered.

    • Main Results:

    • Sensitization in the caudal trigeminal nucleus is a key factor in migraine attacks.
    • Allodynia, a symptom of untreated migraine, is more prevalent in chronic migraine and migraine with aura.
    • Allodynia significantly increases patient disability and impacts treatment strategies.

    Conclusions:

    • Impaired brainstem sensory processing and central sensitization are fundamental to migraine.
    • Allodynia is a critical clinical feature associated with increased migraine severity and disability.
    • Recognizing and managing allodynia is essential for effective migraine patient care.