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Related Concept Videos

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...
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.
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.
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,...
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...

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Related Experiment Video

Updated: May 12, 2026

VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

Brain connectivity and visual attention.

Emily L Parks1, David J Madden

  • 1Department of Psychiatry and Behavioral Sciences, Brain Imaging and Analysis Center, Duke University Medical Center, Durham, NC 27710, USA.

Brain Connectivity
|April 20, 2013
PubMed
Summary
This summary is machine-generated.

Efficient cognitive function relies on interconnected brain networks. This review shows frontoparietal networks are crucial for attention, both during tasks and at rest, with disruptions linked to cognitive deficits.

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Related Experiment Videos

Last Updated: May 12, 2026

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10:41

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Published on: March 25, 2011

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06:46

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuroimaging

Background:

  • Cognitive functioning is increasingly hypothesized to depend on integrated cortical networks.
  • The frontoparietal network is implicated in attentional control, but its integrated function with other networks remains unclear.

Purpose of the Study:

  • To review functional and structural brain connectivity studies related to attentional networks.
  • To explore the relationship between brain activity, connectivity, and attentional performance.

Main Methods:

  • Review of functional and structural brain connectivity studies.
  • Analysis of behavioral data and task-related neuroimaging.
  • Integration of resting-state functional connectivity and diffusion tensor imaging.

Main Results:

  • Frontoparietal cortical regions show coordinated activity during tasks and in resting-state networks.
  • Both task-related and resting-state networks correlate with behavioral attention measures.
  • Anatomical white matter pathways constrain functional connectivity, and network disconnection is linked to cognitive deficits.

Conclusions:

  • Attentional network connectivity, assessed through various methods, is vital for cognitive function.
  • Understanding these networks is crucial for both theoretical models of attention and clinical applications.
  • Integrating behavioral, neuroimaging, and connectivity data is essential for advancing attention research.