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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

Updated: Jun 21, 2026

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise
06:17

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Published on: January 26, 2024

Representational neglect and navigation in virtual space.

Laura Piccardi1

  • 1Dipartimento di Scienze della Salute, Universita degli Studi dell'Aquila, L'Aquila, Italy. laura.piccardi@cc.univaq.it

Cognitive Neuropsychology
|August 7, 2009
PubMed
Summary
This summary is machine-generated.

Patients with representational neglect struggle with spatial orientation and cannot form mental maps of new environments. This navigational deficit stems from impaired mental representation abilities, unlike other brain-damaged groups.

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology

Background:

  • Mental representational disorders impact human orientation and navigation.
  • Representational neglect specifically hinders reorientation in novel environments due to difficulties manipulating mental representations.

Purpose of the Study:

  • To investigate navigational abilities in patients with representational neglect.
  • To compare their performance against brain-damaged patients without neglect and healthy controls in a virtual maze.
  • To elucidate the role of mental representation in navigation, independent of vestibular and proprioceptive cues.

Main Methods:

  • A virtual maze navigation task was employed.
  • Participants included representational neglect patients, other brain-damaged patients (left/right lesions), and healthy controls.
  • Navigation was tested with and without local landmarks to isolate representational deficits.

Main Results:

  • Healthy participants and brain-damaged patients without neglect navigated without deficits.
  • Both perceptual and representational neglect patients showed significant navigational impairments.
  • Only representational neglect patients failed to build or retrieve mental representations of the virtual environment.

Conclusions:

  • Navigational deficits in representational neglect are linked to the inability to form or access mental representations of an environment.
  • This study highlights the critical role of mental representation in spatial orientation and navigation.
  • Virtual environments offer a controlled method to study navigation disorders.