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Related Concept Videos

Vision

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.

Association Areas of the Cortex

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,...

Motor and Sensory Areas of the Cortex

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 Processing

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: Jun 26, 2026

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

Published on: May 7, 2017

Spatial frequency processing preferentially recruits distributed cortical interactions in V1.

Yahia Yassine Belkacemi^1,2, Ekta Jain¹, Jade Vanderpool³

¹Neurophysiology of Visual system, Departement de Sciences Biologiques.

|June 25, 2026

Summary

This summary is machine-generated.

Visual cortex functional connectivity is stimulus-dependent. Spatial frequency processing, unlike orientation, recruits more widespread neural connections in the primary visual cortex (V1).

Keywords:

lateral connectivity network selection orientation spatial frequency visual cortex

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Topographical Estimation of Visual Population Receptive Fields by fMRI

Topographical Estimation of Visual Population Receptive Fields by fMRI

Published on: February 3, 2015

Area of Science:

Neuroscience
Visual System Research
Cortical Connectivity

Background:

The primary visual cortex (V1) processes visual features like orientation and spatial frequency.
Neurons with similar tuning connect more strongly locally.
Mechanisms of distal functional connectivity in V1 remain poorly understood.

Purpose of the Study:

Investigate how visual features influence distal functional connectivity in V1.
Determine if connectivity patterns differ between orientation and spatial frequency processing.

Main Methods:

Recorded multiunit activity in cat V1 layers II/III using spaced electrodes.
Assessed functional connectivity via shift-corrected cross-correlograms.
Compared connectivity under orientation-constant and spatial frequency-constant stimulus conditions.

Main Results:

Significantly more and stronger distal functional connections were observed during spatial frequency-constant conditions compared to orientation-constant.
This effect was evident at both the single-neuron ensemble and population levels.
Distal connectivity is selectively recruited based on stimulus feature, not just proximity or drive.

Conclusions:

Functional connectivity in V1 is stimulus-dependent.
Spatial frequency processing preferentially utilizes distributed cortical interactions.
Feature-dependent distal connectivity may facilitate integration across spatial scales and highlight V1's flexible network organization.