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Related Concept Videos

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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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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Published on: April 11, 2025

A new neural framework for visuospatial processing.

Dwight J Kravitz1, Kadharbatcha S Saleem, Chris I Baker

  • 1Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, Maryland 20892, USA. kravitzd@mail.nih.gov

Nature Reviews. Neuroscience
|March 19, 2011
PubMed
Summary
This summary is machine-generated.

The dorsal visual stream has three distinct pathways supporting conscious and non-conscious visuospatial processing. These pathways are crucial for spatial working memory, visually guided actions, and navigation.

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Area of Science:

  • Neuroscience
  • Visual Processing
  • Cortical Pathways

Background:

  • The dorsal and ventral streams divide cortical visual processing.
  • The ventral stream is the 'What' pathway; the dorsal stream's function is debated ('Where' vs. 'How').

Purpose of the Study:

  • To identify and characterize the distinct pathways originating from the dorsal visual stream.
  • To elucidate the functional roles of these dorsal stream pathways in visuospatial processing.

Main Methods:

  • Tracing neural projections from the dorsal stream to prefrontal, premotor, and medial temporal cortices.
  • Analyzing pathways through posterior cingulate and retrosplenial cortices.

Main Results:

  • Identified three distinct pathways from the dorsal stream.
  • One pathway projects to prefrontal and premotor cortices.
  • A major pathway projects to the medial temporal lobe, with direct and indirect routes.

Conclusions:

  • The dorsal stream comprises multiple pathways, not a single function.
  • These pathways support diverse visuospatial functions, including conscious and non-conscious processing.
  • Key functions include spatial working memory, visually guided action, and navigation.