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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.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
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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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Direct Motor Pathways01:11

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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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Diencephalon: Thalamus and Information Relay01:27

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The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
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Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Motor and Sensory Areas of the Cortex01:14

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
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Related Experiment Video

Updated: Jun 15, 2025

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Transthalamic Pathways for Cortical Function.

S Murray Sherman1, W Martin Usrey2

  • 1Department of Neurobiology, University of Chicago, Chicago, Illinois 60637 msherman@bsd.uchicago.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|August 28, 2024
PubMed
Summary
This summary is machine-generated.

The cerebral cortex uses direct connections and a transthalamic pathway via the higher-order thalamus for signal communication. Understanding these routes is key to brain function and neurological disorders.

Keywords:
cortexefference copythalamus

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Area of Science:

  • Neuroscience
  • Cognitive Science

Background:

  • The cerebral cortex has distinct areas for specific computations.
  • Cortical communication enhances processing power for sensation, action, and cognition.
  • Understanding inter-area communication is crucial for cortical function.

Purpose of the Study:

  • To review evidence for two routes of corticocortical communication.
  • To emphasize the unique processing in the transthalamic pathway.
  • To discuss implications of disorders affecting transthalamic communication.

Main Methods:

  • Review of anatomical evidence.
  • Review of physiological evidence.
  • Review of behavioral evidence.

Main Results:

  • Corticocortical communication historically attributed to direct connections.
  • Emerging evidence supports a role for the higher-order thalamus (transthalamic pathway).
  • The transthalamic pathway involves cortex-thalamus-cortex projections.

Conclusions:

  • Two distinct routes exist for corticocortical communication.
  • The transthalamic pathway offers unique processing capabilities.
  • Disruptions in transthalamic communication have significant consequences for brain function.