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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...
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,...

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Related Experiment Video

Updated: Jun 5, 2026

An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles
09:27

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

Published on: August 25, 2020

Multiple reference frames for saccadic planning in the human parietal cortex.

Yoni Pertzov1, Galia Avidan, Ehud Zohary

  • 1Interdisciplinary Center for Neural Computation and Department of Neurobiology, Hebrew University, Jerusalem, Israel 91904. pertzov@gmail.com

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 21, 2011
PubMed
Summary
This summary is machine-generated.

Human brain activity during eye movements reveals a dual coordinate frame representation. The frontal eye fields and intraparietal sulcus encode saccades based on both movement direction and destination point.

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

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Computational Neuroscience

Background:

  • Understanding the neural basis of spatial representation is crucial for explaining goal-directed behavior.
  • The human cortex processes visual information and motor commands, including eye movements (saccades).
  • Previous research suggests saccades are encoded in various coordinate frames, but the precise neural mechanisms remain debated.

Purpose of the Study:

  • To investigate the coordinate frames used for representing saccades in the human cortex.
  • To differentiate between retinotopic, head-centered, and other spatial representations in brain regions involved in eye movements.
  • To elucidate the role of the frontal eye fields and intraparietal sulcus in spatial coding during saccade planning.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to measure brain activity.
  • Multivariate analysis techniques were applied to analyze fMRI response patterns.
  • A memory-guided saccade task was designed with varying starting points and destination targets.

Main Results:

  • Saccade-related activity in the frontal eye fields and intraparietal sulcus showed correlations for same-vector saccades, suggesting a retinotopic representation.
  • A distinct region within the middle intraparietal sulcus exhibited correlated activity for saccades targeting the same destination, irrespective of movement vector.
  • This indicates the presence of a head-centered coordinate frame representation in the intraparietal sulcus.

Conclusions:

  • The human cortex utilizes multiple coordinate frames for saccade representation.
  • The intraparietal sulcus plays a key role in integrating different spatial reference frames for eye movements.
  • These findings support theories suggesting that eye movements are anchored to egocentric or allocentric spatial representations, not solely retinal input.