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Related Concept Videos

Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
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: May 29, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Trans-saccadic processing of visual and motor planning during sequential eye movements.

Supriya Ray1, Neha Bhutani, Vishal Kapoor

  • 1National Brain Research Centre, Near NSG Campus, Nainwal More, Manesar 122050, Haryana, India.

Experimental Brain Research
|September 21, 2011
PubMed
Summary

The brain uses partial visual and motor processing before eye movements to guide subsequent actions, despite saccade execution being a processing bottleneck. This reveals how the brain maintains visual continuity during natural scanning.

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Related Experiment Videos

Last Updated: May 29, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

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An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles

Published on: August 25, 2020

Area of Science:

  • Cognitive Neuroscience
  • Oculomotor Systems
  • Visual Perception

Background:

  • Maintaining perceptual continuity across saccades, or rapid eye movements, is crucial for coherent visual experience but remains poorly understood.
  • The brain must integrate fragmented visual information captured during fixations despite the discontinuity introduced by eye movements.

Purpose of the Study:

  • To investigate how the brain processes information across sequential saccades to maintain perceptual continuity.
  • To determine the extent of visual and motor processing that occurs during the saccade execution bottleneck.

Main Methods:

  • Adapted a dual-task paradigm framework to study information processing across sequential saccades.
  • Utilized a cued double-step saccade task to analyze reaction times (RTs).
  • Differentiated between models of no trans-saccadic processing, trans-saccadic visual processing, and combined visual processing with saccade planning.

Main Results:

  • Saccade execution acts as a processing bottleneck, limiting access to incoming visual information.
  • Partial visual and motor processing occurs prior to saccade execution.
  • This pre-saccadic processing is utilized to guide the planning and execution of the next eye movement.

Conclusions:

  • The oculomotor system employs pre-saccadic visual and motor processing to bridge information gaps between fixations.
  • This mechanism contributes to the brain's ability to maintain a stable perception of the world during natural visual scanning.
  • Understanding these processes offers insights into the neural basis of visual continuity.