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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.
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,...

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Related Experiment Video

Updated: Jun 17, 2026

Cross-Modal Multivariate Pattern Analysis
13:51

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

Multiscale pattern analysis of orientation-selective activity in the primary visual cortex.

Jascha D Swisher1, J Christopher Gatenby, John C Gore

  • 1Psychology Department and Vanderbilt Vision Research Center, Vanderbilt University, Nashville, Tennessee 37240, USA. j.swisher@vanderbilt.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 8, 2010
PubMed
Summary
This summary is machine-generated.

High-resolution functional magnetic resonance imaging (fMRI) reveals orientation signals in the visual cortex at millimeter scales. These signals likely stem from irregular arrangements of orientation columns, not just individual columns.

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09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Area of Science:

  • Neuroscience
  • Visual Neuroscience
  • Neuroimaging

Background:

  • Orientation columns in the primary visual cortex (V1) are critical for visual processing.
  • Previous studies suggested coarse resolution neuroimaging could detect orientation information, but the source remained unclear.
  • Hypotheses proposed random spatial irregularities in columnar maps as the signal origin.

Purpose of the Study:

  • To investigate the spatial scales of orientation-selective information in cat and human V1.
  • To determine if signals detected at coarse resolutions originate from fine-scale columnar structures.
  • To provide direct evidence for the spatial distribution of orientation information.

Main Methods:

  • Utilized high-field, high-resolution functional magnetic resonance imaging (fMRI).
  • Applied multivariate pattern analysis and a multiscale pattern analysis approach.
  • Employed spatial lowpass and highpass filtering to isolate residual activity patterns for linear classification.

Main Results:

  • Cat V1 showed strong orientation signals at the scale of individual columns (0.3125 mm resolution).
  • Reliable orientation bias was detected at millimeter scales in both cat and human V1 (1 mm resolution).
  • Human V1 orientation information was predominantly at millimeter scales, with minor global contributions >1 cm.

Conclusions:

  • High-resolution fMRI demonstrates a reliable millimeter-scale orientation signal in V1.
  • This signal likely arises from irregular spatial arrangements of orientation columns and vasculature.
  • fMRI pattern analysis is sensitive to signals from other irregular brain structures.