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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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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Parietal encoding of action in depth.

Stefano Ferraina1, Alexandra Battaglia-Mayer, Aldo Genovesio

  • 1Department of Physiology and Pharmacology and CSFM, SAPIENZA, University of Rome, Rome, Italy.

Neuropsychologia
|January 22, 2009
PubMed
Summary
This summary is machine-generated.

The posterior parietal cortex is vital for transforming visual information to guide eye and hand movements in depth. This review synthesizes current knowledge on its role in encoding movement depth and its impairment in parietal patients.

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Area of Science:

  • Neuroscience
  • Primate Brain Research
  • Visuomotor Control

Background:

  • The posterior parietal cortex (PPC) is recognized for its role in coordinate transformations for visuomotor control.
  • Existing research extensively covers eye and hand movements but lacks detail on encoding depth and its impairment.

Purpose of the Study:

  • To provide a comprehensive review of the PPC's function in encoding target distance and hand movement in depth.
  • To consolidate fragmented literature on the dorsal visuomotor stream's role in depth encoding.

Main Methods:

  • Literature review synthesizing neurophysiological studies in monkeys.
  • Analysis of human parietal lobe lesion studies.

Main Results:

  • The PPC is a key area for transforming visual information for depth-guided movements.
  • Evidence suggests specific physiological processes within the PPC encode movement in depth.

Conclusions:

  • Encoding eye and hand movement in depth is a prototypical function of the dorsal visuomotor stream.
  • Further research is needed to fully understand the mechanisms and clinical implications of PPC dysfunction in depth perception.