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Unifying Visual Space Across the Left and Right Hemifields.

Zhimin Chen1, Anna Kosovicheva1,2, Benjamin Wolfe1,3

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The visual system dynamically recalibrates alignment across left and right visual fields to maintain a stable perception of space. This recalibration integrates separate visual inputs, ensuring a unified and continuous visual experience.

Keywords:
adaptationhemifieldopen dataopen materialsperceptual continuitypsychophysicsvisual fieldsvisual perception

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Visual space perception relies on integrating inputs from separate cortical hemispheres.
  • Maintaining spatial stability despite hemispheric processing is crucial for perception.

Purpose of the Study:

  • To investigate the dynamic recalibration mechanisms integrating visual information across hemifields.
  • To determine if the visual system aligns representations between left and right visual fields.

Main Methods:

  • Subjects adapted to vertically offset lines straddling the visual vertical meridian.
  • Vernier alignment judgments were used to measure aftereffects following adaptation.
  • Adaptation stimuli included static patterns, moving lines, and movie clips.

Main Results:

  • A negative aftereffect was observed, indicating recalibration of perceived alignment.
  • The aftereffect was specific to vertical misalignments, not horizontal.
  • Aftereffects occurred regardless of stimulus coherence or motion.

Conclusions:

  • The visual system employs continuous dynamic recalibration to unify left and right visual space.
  • This recalibration mechanism ensures consistent alignment perception across visual fields.
  • This process contributes to the perception of a continuous and stable visual world.