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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"...
Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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.
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

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Related Experiment Video

Updated: May 31, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
07:04

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Hemispatial neglect reflected on visual memory.

R Luukkainen-Markkula1, I M Tarkka, K Pitkänen

  • 1Brain Research and Rehabilitation Center Neuron, Kuopio, Finland. riitta.luukkainen-markkula@neuron.fi

Restorative Neurology and Neuroscience
|June 24, 2011
PubMed
Summary
This summary is machine-generated.

Patients with hemispatial neglect show deficits in visual memory tests, impacting attention and spatial working memory. These impairments, particularly in delayed recall, are lateralized to the left side.

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Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
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Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

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Last Updated: May 31, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
07:04

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
11:12

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neurology

Background:

  • Hemispatial neglect is associated with lateralized and nonlateralized attention deficits.
  • Patients with neglect exhibit impaired spatial working memory and reduced capacity.
  • Understanding neglect's impact on visual memory is crucial for clinical assessment.

Purpose of the Study:

  • To investigate how hemispatial neglect affects performance on standard clinical visual memory tests.
  • To assess the relationship between neglect severity and visual memory deficits.
  • To explore the role of attention and working memory in neglect-related memory impairments.

Main Methods:

  • Twelve patients with right hemisphere lesions and left neglect and twelve matched controls were evaluated.
  • Tests included the Behavioural Inattention Test, WMS-R visual reproduction, object memory, Rey figure, list learning, and Corsi block test.
  • Performance was analyzed in relation to neglect severity and hemianopia.

Main Results:

  • Neglect severity correlated with object naming, Rey figure copying, and immediate visual reproduction.
  • Patients showed reduced naming and copying from both sides, with impaired immediate and delayed visual recall, especially from the left.
  • Post-recovery, visual search remained impaired, immediate recall normalized, but delayed recall deficits persisted and were left-lateralized.

Conclusions:

  • Hemispatial neglect is linked to spatial working memory bias and reduced nonlateralized attention capacity during encoding and immediate recall.
  • Delayed visual memory recall deficits in neglect are lateralized to the left side of memorized material.
  • These findings highlight specific memory processing deficits in neglect patients.