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Related Concept Videos

Cerebrospinal Fluid01:21

Cerebrospinal Fluid

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Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain....
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Sensory Modalities01:15

Sensory Modalities

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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
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Major Somatic Sensory Pathways01:28

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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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Introduction to Special Senses01:26

Introduction to Special Senses

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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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What is a Sensory System?01:31

What is a Sensory System?

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Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
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Related Experiment Video

Updated: Jul 25, 2025

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
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[Polymodal sensory integration at the interface with the cerebrospinal fluid].

Claire Wyart1

  • 1Sorbonne université, Inserm U1127, UMR CNRS 7225, institut du cerveau (ICM), 47 boulevard de l'Hôpital, 75013 Paris, France.

Medecine Sciences : M/S
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Summary

The cerebrospinal fluid (CSF) interfaces with sensory neurons that detect infections and spinal curvature. This system, involving the Reissner fiber and urotensin peptides, influences movement, posture, and spinal alignment.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Developmental Biology

Context:

  • The cerebrospinal fluid (CSF) acts as a critical interface between the central nervous system (CNS) and the body.
  • Sensory neurons within the spinal cord are directly exposed to CSF, enabling them to detect changes in its composition, such as during bacterial meningitis.
  • These CSF-contacting neurons also function as an axial mechanosensory system, sensing spinal curvature via interaction with the Reissner fiber.

Purpose:

  • To elucidate the multifaceted roles of cerebrospinal fluid-contacting neurons.
  • To investigate the mechanisms by which these neurons sense biochemical changes and mechanical stimuli.
  • To explore the involvement of this sensory system in motor control, posture, and developmental/aging processes.

Summary:

  • CSF-contacting neurons respond to bacterial infections and mechanical cues like spinal curvature.
  • The Reissner fiber, a proteinaceous polymer in the central canal, is integral to the mechanosensory function of these neurons.
  • Activation by body axis compression modulates motor circuits for enhanced speed and postural stability.
  • During development and aging, urotensin peptides released by this system promote axial and spinal alignment by acting on skeletal muscle receptors.

Impact:

  • Reveals a novel sensory system within the CNS that integrates biochemical and mechanical information.
  • Highlights the role of CSF-contacting neurons in maintaining homeostasis, motor function, and body axis alignment throughout life.
  • Provides insights into potential therapeutic targets for neurological disorders and age-related changes affecting posture and movement.