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Related Concept Videos

Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

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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.
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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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Direct Motor Pathways01:11

Direct Motor Pathways

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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.
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Sympathetic Pathways: Sympathetic Chain Ganglia01:20

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The sympathetic chain ganglia, also known as the sympathetic trunk ganglia or paravertebral ganglia, are a series of ganglia located bilaterally on either side of the spinal column. These ganglia serve as relay stations for the sympathetic nervous system. Preganglionic neurons originating in the spinal cord project their axons to the sympathetic chain ganglia. Within the ganglia, these preganglionic fibers synapse with postganglionic neurons.The postganglionic neurons of the sympathetic trunk...
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Cranial Nerves: Types Part I01:14

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
Olfactory Nerve (Cranial Nerve I)
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Indirect Motor Pathways01:22

Indirect Motor Pathways

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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
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Updated: Oct 1, 2025

Author Spotlight: Exploring Peripheral Mechanisms of Neuropathic Pain in Trigeminal Nerve Injury
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The trigeminal pathways.

Louis-Marie Terrier1,2, Nouchine Hadjikhani3,4, Christophe Destrieux5,6

  • 1UMR 1253, ibrain, Université de Tours, Inserm, 10 Boulevard Tonnellé, 37032, Tours, France. louismarie.terrier@univ-tours.fr.

Journal of Neurology
|March 6, 2022
PubMed
Summary
This summary is machine-generated.

The trigeminal system is crucial for facial and brain pain, underpinning conditions like headaches and neuralgia. Understanding its complex anatomy and modulation offers new therapeutic avenues for pain relief.

Keywords:
AnatomyCluster headacheCranial sensitivityNeuromodulationSomatotopy organizationTrigeminal neuralgiaTrigeminal systemTrigeminovascular system

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Area of Science:

  • Neuroscience
  • Anatomy
  • Pain Research

Background:

  • The trigeminal system's role in facial and dural sensitivity is well-established.
  • Emerging evidence highlights its significance in brain nociceptive innervation.
  • It serves as the anatomical basis for frequent conditions like headaches and trigeminal neuralgia.

Purpose of the Study:

  • To provide a comprehensive review of the trigeminal system's anatomy and function.
  • To elucidate the pathophysiology of trigeminal system-related pain conditions.
  • To explore innovative treatment strategies targeting the trigeminal pathway.

Main Methods:

  • Review of classical anatomical data and recent scientific literature.
  • Detailed presentation of the trigeminal pathway organization from nerve nuclei to the cortex.
  • Exploration of trigeminal system modulation, reflexes, and therapeutic interventions.

Main Results:

  • The trigeminal pathway exhibits a dual somatotopic-modal organization, particularly in the juxtapontine nerve segment and brainstem nuclei.
  • Trigeminal system modulation involves reflexes like trigemino-cardiac and trigemino-autonomic reflexes.
  • Understanding this organization is key for diagnosis and treatment of orofacial pain and headaches.

Conclusions:

  • A thorough understanding of trigeminal system anatomy and neurobiology is essential for managing headaches and orofacial pain.
  • Innovative treatments, including neuromodulatory and lesional approaches, can target the trigeminal system for pain relief.
  • Further research into trigeminal system modulation may reveal novel therapeutic targets for pain management.