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Related Concept Videos

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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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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Depth Perception and Spatial Vision01:15

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Somatosensory, Motor, and Association Cortex01:23

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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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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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Tactile and Chemical Senses01:27

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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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Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
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Combining proprioception and touch to compute spatial information.

Elisa Canzoneri1, Elisa Raffaella Ferrè, Patrick Haggard

  • 1Institute of Cognitive Neuroscience, University College London, Alexandra House, Queen Square, London, WC1N 3AR, UK, elisa.canzoneri3@unibo.it.

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|January 29, 2014
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Summary
This summary is machine-generated.

Body posture automatically influences tactile spatial judgments, even when irrelevant. Rotating the forearm by 180° increased errors, suggesting automatic body localization in tactile perception.

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Proprioception

Background:

  • Tactile spatial localization relies on integrating skin receptor input with body posture information.
  • The automatic influence of body posture on tactile perception, independent of task relevance, remains an area of investigation.

Purpose of the Study:

  • To investigate whether body posture automatically influences tactile spatial judgments.
  • To determine if tactile localization accuracy is affected by non-canonical body positions.

Main Methods:

  • Participants judged the location of tactile stimuli on the forearm and finger relative to anatomical landmarks.
  • Experiments involved canonical, non-canonical (90°), and reversed (180°) forearm and finger postures.
  • Performance was assessed by measuring judgement errors in tactile localization across different postures.

Main Results:

  • Tactile localization errors significantly increased when the forearm posture was rotated 180° from the canonical position.
  • Reversing both forearm and finger postures to their canonical orientation restored performance.
  • These findings indicate a robust effect of body posture on tactile spatial judgment.

Conclusions:

  • Body posture is automatically processed and integrated into tactile spatial perception.
  • Proprioceptive and tactile information are combined for automatic body localization in egocentric space.
  • This automatic localization mechanism is crucial for accurate tactile perception.