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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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Brain motor functional changes after somatosensory discrimination training.

Elisabetta Sarasso1,2,3, Federica Agosta1, Federico Temporiti1,3,4

  • 1Neuroimaging Research Unit, Institute of Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Via Olgettina, 60, 20132, Milan, Italy.

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|September 2, 2017
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Somatosensory discrimination training enhanced manual dexterity and altered brain activity in healthy individuals. This training modulated sensorimotor areas, suggesting potential for motor rehabilitation.

Keywords:
Functional magnetic resonance imagingHealthy volunteersPhysical therapySensorimotor cortexTouch perception

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Motor Control

Background:

  • Somatosensory discrimination training may influence cognitive processes like movement planning.
  • Understanding its effects on brain activity during motor and sensory tasks is crucial.

Purpose of the Study:

  • To assess the impact of somatosensory discrimination training on brain functional activity using functional magnetic resonance imaging (fMRI).
  • To investigate changes during motor and sensory tasks in healthy subjects.

Main Methods:

  • Thirty-nine healthy subjects were randomized into an experimental (somatosensory training) and a control group.
  • fMRI was used to evaluate brain activity during tactile stimulation, object manipulation, and motor sequence execution before and after a 2-week training period.

Main Results:

  • The experimental group showed improved manual dexterity across all tests.
  • fMRI revealed decreased ipsilateral sensorimotor activation during tactile tasks and altered activation in the postcentral gyrus, thalamus, basal ganglia, and cerebellum during motor tasks.

Conclusions:

  • Sensory discrimination training in healthy subjects is linked to lateralization of brain activity in sensorimotor areas.
  • Further research is needed to explore its utility in motor rehabilitation for patients with central nervous system lesions.