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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...
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 16, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

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Published on: April 16, 2014

Developmental topographical disorientation in a healthy subject.

F Bianchini1, C Incoccia, L Palermo

  • 1Dipartimento Psicologia 39, Sapienza Università di Roma, Rome, Italy.

Neuropsychologia
|February 11, 2010
PubMed
Summary

This study details a severe case of developmental topographical disorder in a healthy young man, highlighting deficits in spatial navigation and environmental orientation. The findings confirm this developmental disorder and offer insights into spatial processing.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Developmental Psychology

Background:

  • Developmental Topographical Disorder (DTD) is a rare condition affecting spatial navigation.
  • Previous cases of DTD are limited, making further research crucial for understanding its architecture.

Observation:

  • A healthy 22-year-old male (F.G.) presented with profound difficulties in environmental orientation and navigation.
  • Neuroimaging revealed no structural brain abnormalities.
  • Comprehensive neuropsychological assessment indicated severe DTD and deficits in cognitive processes essential for navigation.

Findings:

  • F.G. exhibited a more severe form of DTD than previously reported cases.
  • He lacked navigational skills and failed to develop compensatory strategies.
  • A specific deficit in processing the spatial relationships between parts of a whole was identified.

Implications:

  • This case reinforces the existence of developmental topographical disorders.
  • It provides new insights into the cognitive architecture and developmental trajectory of topographical skills.
  • Understanding these deficits can inform interventions for navigation and spatial processing challenges.