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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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Updated: Jun 4, 2025

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cTBS over ventral cortex enhances depth perception.

Justin K N Or1, Dorita H F Chang1,2

  • 1Department of Psychology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.

Frontiers in Neuroscience
|December 19, 2024
PubMed
Summary
This summary is machine-generated.

Continuous theta-burst stimulation (cTBS) improved stereoscopic depth perception when applied to the lateral occipital complex (LOC). This neurostimulation technique did not enhance luminance discrimination or affect other visual cortex sites.

Keywords:
continuous theta burst stimulationlateral occipital complexoccipital cortexrepetitive transcranial magnetic stimulationstereoscopic plasticity

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Science

Background:

  • Stereoscopic depth perception varies across individuals but retains plasticity in adulthood.
  • Understanding the mechanisms of this plasticity is crucial for potential therapeutic interventions.

Purpose of the Study:

  • To investigate the impact of continuous theta-burst stimulation (cTBS) on stereoscopic depth perception.
  • To identify specific visual cortex regions that modulate stereoscopic plasticity through neurostimulation.

Main Methods:

  • cTBS was applied to the occipital cortex (V1/V2), lateral occipital complex (LOC), and a control site (Cz).
  • Depth and luminance discrimination tasks were performed before and after stimulation.

Main Results:

  • Significant improvement in depth discrimination was observed after cTBS over the LOC.
  • No significant changes in luminance discrimination were found.
  • cTBS over occipital cortex and Cz did not impact performance on either task.

Conclusions:

  • The lateral occipital complex (LOC) is a critical region for plasticity in stereoscopic vision in healthy adults.
  • cTBS may enhance depth perception by reducing neural noise in the ventral visual cortex.