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Revisiting unilateral neglect.

James Danckert1, Susanne Ferber

  • 1Canada Research Chair (Tier II) in Cognitive Neuroscience, Department of Psychology, University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1. jdancker@uwaterloo.ca

Neuropsychologia
|November 23, 2005
PubMed
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Unilateral neglect is not just an attention issue. This review suggests it results from combined impairments in spatial attention, motor behavior, and spatial working memory.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Unilateral neglect is a neurological disorder characterized by failure to respond to stimuli on the side opposite the brain lesion.
  • Traditionally, neglect has been attributed primarily to deficits in attentional orienting mechanisms.

Purpose of the Study:

  • To review spatial orienting and exploratory motor biases in unilateral neglect.
  • To explore additional factors influencing neglect presentation.
  • To propose an updated neurological model of neglect.

Main Methods:

  • Selective review of existing literature on unilateral neglect.
  • Analysis of spatial orienting and motor behavior in neglect patients.
  • Integration of findings to inform theoretical models.

Related Experiment Videos

Main Results:

  • Patients with unilateral neglect exhibit prominent biases in spatial orienting and exploratory motor behavior.
  • Factors beyond attentional orienting significantly impact neglect presentation.
  • A combination of distinct but interacting impairments likely underlies neglect.

Conclusions:

  • Unilateral neglect arises from a complex interplay of attentional, motor, and spatial working memory deficits.
  • The cardinal symptom of lost awareness in neglect is a consequence of these combined impairments.
  • Current models should incorporate these multifaceted deficits for a comprehensive understanding of neglect.