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Related Experiment Videos

Decrease of contralateral neglect by neck muscle vibration and spatial orientation of trunk midline

H O Karnath1, K Christ, W Hartje

  • 1Department of Neurology, Rheinisch-Westfälische Technische Hochschule Aachen, Germany.

Brain : a Journal of Neurology
|April 1, 1993
PubMed
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Proprioceptive input from neck muscles can reduce left-sided neglect in patients with right hemisphere damage. Vibrating neck muscles or turning the trunk leftward improved spatial awareness and exploration.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Rehabilitation Medicine

Background:

  • Left-sided neglect, a deficit in spatial attention, often results from right hemisphere brain damage.
  • Current understanding of neglect suggests involvement of egocentric reference frames and sensory integration.

Observation:

  • Patients with right hemisphere lesions and left-sided neglect were tested on visual stimulus detection.
  • Neglect was observed in the contralesional left visual field under standard conditions.
  • Stimulation of left posterior neck muscles (vibration) or trunk turning to the left reduced neglect.

Findings:

  • Proprioceptive afferent information from neck muscles, through real or apparent muscle lengthening, ameliorated contralateral neglect.
  • Vibrating hand muscles or turning the head left did not yield compensatory effects, highlighting neck-specific input.

Related Experiment Videos

  • Head-on-trunk proprioception significantly influences spatial awareness and the extent of neglected space.

    • Implications:

    • Neck proprioception plays a crucial role in generating the egocentric frame of reference for spatial orientation.
    • Neck muscle stimulation may offer a novel therapeutic strategy for visuospatial neglect rehabilitation.
    • Findings suggest a link between neck afference, spatial localization shifts, and visuomotor coordination.