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Disconnections in personal neglect.

S Bertagnoli1, V Pacella2, E Rossato3

  • 1NPSY-Lab.VR, Department of Human Sciences, University of Verona, Lungadige Porta Vittoria, 17, 37129, Verona, Italy.

Brain Structure & Function
|June 7, 2022
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Summary
This summary is machine-generated.

Personal neglect, a disorder where one side of the body is ignored, is linked to damage in a specific brain network. This finding expands understanding beyond simple cortical lesions to include white matter tract disconnections.

Keywords:
FornixHeschl’s gyrusMultivariate voxel lesion symptom mappingPersonal neglectThalamusWhite matter disconnection

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Psychology

Background:

  • Personal neglect involves impaired body perception, often overlooked as a symptom of unilateral spatial neglect.
  • Previous research focused on cortical lesions and somatosensory deficits, with limited investigation into personal neglect's neuroanatomy.

Purpose of the Study:

  • To investigate the neuroanatomical correlates of personal neglect, hypothesizing involvement of both grey and white matter lesions.
  • To analyze a large patient sample using advanced lesion mapping techniques.

Main Methods:

  • Advanced lesion analyses were performed on 104 right-hemisphere damaged patients, including 72 with personal neglect.
  • Grey and white matter lesions were analyzed, controlling for extrapersonal neglect, anosognosia, motor deficits, lesion size, and time since onset.

Main Results:

  • Personal neglect is associated with lesions in a medial network involving the temporal cortex (Heschl's gyrus), ventro-lateral thalamic nuclei, and the fornix.
  • Findings suggest personal neglect arises from disconnections within this medial network, not just discrete lesions.

Conclusions:

  • Personal neglect involves a convergence of sensorimotor, spatial representation, and self-referred information processing.
  • This study highlights the role of white matter tracts and a specific medial network in personal neglect.