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Related Concept Videos

Somatosensation01:33

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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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Somatosensory, Motor, and Association Cortex01:24

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Sensory Perception: Organization of the Somatosensory System01:11

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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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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.
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Overview of Somatic Sensory Pathways01:29

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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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The dorsal...
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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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Somatosensory Cortex Efficiently Processes Touch Located Beyond the Body.

Luke E Miller1, Cécile Fabio2, Valeria Ravenda3

  • 1Integrative Multisensory Perception Action & Cognition Team-ImpAct, Lyon Neuroscience Research Center, INSERM U1028, CNRS U5292, 16 Avenue Doyen Lépine, Bron 69676, France; University of Lyon 1, 43 Boulevard du 11 Novembre 1918, Villeurbanne 69100, France; Hospices Civils de Lyon, Neuro-immersion, 16 Avenue Doyen Lépine, Bron 69676, France.

Current Biology : CB
|December 10, 2019
PubMed
Summary
This summary is machine-generated.

The human brain treats tools as extensions of the body by repurposing sensory processing. This allows for accurate tactile localization on tools, similar to how we sense our own limbs.

Keywords:
efficient codingelectroencephalographyembodimentextended sensingmechanoreceptorssensorimotorsomatosensory cortextool usetouch

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Area of Science:

  • Neuroscience
  • Human-Computer Interaction
  • Sensory Perception

Background:

  • The concept of tools as extensions of the user has long been debated.
  • Neural mechanisms underlying tool embodiment remain largely unknown.
  • Previous research suggests tactile localization on tools is highly accurate.

Purpose of the Study:

  • To investigate the neural basis of tool embodiment.
  • To determine how the brain processes tactile information from tools.
  • To explore if the brain treats tools as extended sensory organs.

Main Methods:

  • Combined behavioral experiments, electroencephalography (EEG), and neuronal modeling.
  • Assessed tactile localization accuracy on a hand-held tool.
  • Analyzed neural dynamics in somatosensory and parietal cortices using EEG.
  • Utilized multivariate decoding and source reconstruction techniques.
  • Included a patient with proprioceptive deafferentation.

Main Results:

  • Tactile touches on a tool were immediately coded in the primary somatosensory and posterior parietal cortices.
  • Similar neural responses were observed in a patient with deafferentation, suggesting reliance on vibrational patterns.
  • Simulations indicated efficient processing of mechanoreceptor responses.
  • EEG data revealed similar cortical processing stages for touches on tools and the arm.
  • Decoding algorithms confirmed repurposing of limb-based cortical processes for tool touch mapping.

Conclusions:

  • The human brain recruits existing somatosensory neural dynamics to process tactile information from tools.
  • Tools can be effectively integrated as tactile extensions of the body.
  • This neural strategy allows for rapid and efficient sensory extension through tool use.