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Related Concept Videos

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...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
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...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...

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Related Experiment Video

Updated: May 11, 2026

Using Looming Visual Stimuli to Evaluate Mouse Vision
05:07

Using Looming Visual Stimuli to Evaluate Mouse Vision

Published on: June 13, 2019

Higher order visual processing in the visual cortex.

Robert Shapley1

  • 1Center for Neural Science, New York University, New York, NY, United States.

Handbook of Clinical Neurology
|May 9, 2026
PubMed
Summary
This summary is machine-generated.

The visual cortex integrates visual signals from the retina to create neural representations of object properties like shape, color, and motion. This integration occurs in a recurrent network sensitive to incoming visual information.

Keywords:
Binocular disparityDirection selectivityDouble-opponent cellsOrientation tuningVisuotopic map

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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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A Method to Quantify Visual Information Processing in Children Using Eye Tracking

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Related Experiment Videos

Last Updated: May 11, 2026

Using Looming Visual Stimuli to Evaluate Mouse Vision
05:07

Using Looming Visual Stimuli to Evaluate Mouse Vision

Published on: June 13, 2019

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

A Method to Quantify Visual Information Processing in Children Using Eye Tracking
09:47

A Method to Quantify Visual Information Processing in Children Using Eye Tracking

Published on: July 9, 2016

Area of Science:

  • Neuroscience
  • Visual Processing
  • Computational Neuroscience

Background:

  • The retina transmits visual information about object surfaces (shape, lightness, color, location) to the visual cortex.
  • Early visual cortex features a visuotopic map of the visual field, integrating inputs from both eyes via the lateral geniculate nucleus (LGN).

Purpose of the Study:

  • To explain how the visual cortex combines parallel retinocortical channels into coherent neural representations.
  • To detail the mechanisms by which the visual cortex computes visual attributes such as edge orientation, motion direction, color, and depth.

Main Methods:

  • Analysis of signal integration from ON and OFF feedforward LGN inputs.
  • Examination of color signal combination from parvocellular, koniocellular, and magnocellular LGN cells.
  • Investigation of binocular signal combination for stereopsis (depth perception).

Main Results:

  • The visual cortex computes edge orientation, motion direction, object color, and depth through signal combination.
  • The visual cortex is a highly recurrent network with balanced excitatory and inhibitory synaptic currents.
  • Balanced recurrent networks are highly sensitive to feedforward inputs.

Conclusions:

  • The cortex successfully combines visual signals from parallel pathways to form perceptually relevant neural representations.
  • The recurrent and balanced nature of cortical networks is crucial for processing visual information and responding to inputs.