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Related Concept Videos

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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Somatosensation01:33

Somatosensation

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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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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.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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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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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Propagation of Action Potentials01:23

Propagation of Action Potentials

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The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
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Related Experiment Video

Updated: Jan 10, 2026

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Spontaneous network transitions predict somatosensory perception.

Abhinav Sharma1,2,3, Joachim Lange1, Diego Vidaurre4,5

  • 1Institute for Clinical Neuroscience and Medical Psychology Medical Faculty, Heinrich-Heine University, Universitätsstr. 1, 40225 Düsseldorf, Germany.

Cerebral Cortex (New York, N.Y. : 1991)
|November 26, 2025
PubMed
Summary
This summary is machine-generated.

Brain network activity before a stimulus influences sensory perception. Specific network transitions correlate with correct or incorrect perceptions, highlighting the importance of brain network flexibility for accurate sensory processing.

Keywords:
MEGcoherenceconnectivityspontaneous whole-brain networkstactile perception

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Perception

Background:

  • Spontaneous neural activity in local sensory areas is linked to perception of ambiguous stimuli.
  • The role of whole-brain spontaneous networks in perception remains unclear.

Purpose of the Study:

  • To investigate the contribution of whole-brain spontaneous network interactions to sensory perception.
  • To determine how prestimulus brain activity influences tactile temporal discrimination.

Main Methods:

  • Utilized an ambiguous tactile temporal discrimination task.
  • Analyzed spontaneous brain network activity in the prestimulus period.
  • Examined network transitions preceding correct and incorrect perceptions.

Main Results:

  • Whole-brain network interactions in the seconds before a stimulus impact perception.
  • Transitions to frontal and multifrequency networks are crucial for correct perception.
  • Transitions to an alpha-parietal network precede incorrect perceptions.
  • Faster brain network switching before stimulus presentation correlates with correct stimulus detection.

Conclusions:

  • Prestimulus whole-brain network dynamics, not just local activity, significantly contribute to sensory perception.
  • Network flexibility, indicated by faster brain switches, is essential for accurate sensory processing.
  • Specific network configurations predict the success or failure of perceptual tasks.