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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.
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
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...
Indirect Motor Pathways01:22

Indirect Motor Pathways

The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

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Related Experiment Video

Updated: Jun 10, 2026

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Pattern motion representation in primary visual cortex is mediated by transcortical feedback.

K E Schmidt1, S G Lomber, B R Payne

  • 1Cortical Function and Dynamics, Max-Planck Institute for Brain Research, Frankfurt/M, Germany. schmidt@mpih-frankfurt.mpg.de

Neuroimage
|August 17, 2010
PubMed
Summary
This summary is machine-generated.

Feedback connections from higher motion areas influence early visual processing. This suggests global visual features are fed back to lower areas, aiding integration of local cues into a cohesive perception.

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Last Updated: Jun 10, 2026

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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13:51

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Published on: November 9, 2011

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Published on: June 19, 2016

Area of Science:

  • Visual Neuroscience
  • Computational Neuroscience

Background:

  • Visual information integration is key to perception.
  • Hierarchical processing is a common model, but a single convergence area remains unidentified.
  • Contextual integration occurs in early visual areas via subthreshold influences, with unclear mechanisms.

Purpose of the Study:

  • To investigate the role of feedback connections in integrating global motion cues in early visual areas.
  • To determine how subthreshold influences from higher areas mediate contextual integration.

Main Methods:

  • Combined reversible thermal deactivation with optical imaging of intrinsic signals.
  • Targeted feedback connections from a higher motion processing area (posteromedial suprasylvian sulcus).

Main Results:

  • Feedback from the posteromedial suprasylvian sulcus critically influences global motion cue integration in early visual areas (V1).
  • Demonstrated that these feedback signals are essential for discriminating between global and local motions.
  • Observed imprints of pattern motion in V1, supporting the influence of global cues.

Conclusions:

  • Feedback connections from higher motion areas play a crucial role in early visual processing.
  • Global visual features are fed back to lower visual units to facilitate the integration of local cues.
  • Challenges the purely hierarchical model by showing top-down influences in early visual areas.