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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 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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Imagined paralysis impairs embodied spatial transformations.

Matthias Hartmann1, Caroline J Falconer, Fred W Mast

  • 1a Department of Psychology , Muesmattstrasse 45, University of Bern , Bern , Switzerland.

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Summary
This summary is machine-generated.

Imagined paralysis impairs mental rotation of imitable body postures in healthy individuals. This suggests the body schema incorporates motor constraints, influencing embodied cognition and spatial transformations.

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Area of Science:

  • Cognitive Neuroscience
  • Embodied Cognition
  • Body Schema Research

Background:

  • Motor deficits and amputations alter mental body part rotation.
  • The body schema is crucial for mental spatial transformations.
  • Previous research focused on actual motor impairments.

Purpose of the Study:

  • To investigate the effect of imagined paralysis on mental transformations in healthy participants.
  • To determine if motoric constraints influence embodied cognition.
  • To explore the role of emulation in spatial judgments.

Main Methods:

  • Participants performed leg laterality judgments on body postures.
  • Postures were presented in imitable and non-imitable forms at various orientations.
  • Imagined paralysis was induced to simulate motor deficits.

Main Results:

  • Imagined paralysis selectively impaired mental transformations of imitable postures.
  • This impairment suggests an inability to fully emulate stimulus postures.
  • Results indicate modulation of the body schema due to imagined motor constraints.

Conclusions:

  • The body schema integrates top-down motoric constraints.
  • Embodied cognition in healthy individuals is influenced by these constraints.
  • Imagined paralysis provides insights into body schema flexibility.