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

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Related Experiment Video

Updated: May 24, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

Hierarchical processing of face viewpoint in human visual cortex.

Vadim Axelrod1, Galit Yovel

  • 1School of Psychological Sciences, Department of Psychology, Tel Aviv University, Tel Aviv 69987, Israel. vadim.axelrod@gmail.com

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 8, 2012
PubMed
Summary
This summary is machine-generated.

Human brain processing of faces gradually achieves view invariance. Mirror-symmetric face views show partial invariance in high-level visual areas, suggesting an intermediate step in visual processing.

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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

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Related Experiment Videos

Last Updated: May 24, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

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Published on: August 1, 2018

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
07:11

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • The primate visual system exhibits remarkable view invariance, recognizing objects from various angles.
  • A prominent theory suggests hierarchical processing: view-selective mechanisms in early visual areas gradually become view invariant in higher-level areas.
  • Prior research indicated partial view invariance for mirror-symmetric faces in non-human primates, but human evidence was lacking.

Purpose of the Study:

  • To investigate hierarchical face-view processing in the human visual cortex.
  • To explore the emergence of view invariance using functional magnetic resonance imaging (fMRI).
  • To identify neural correlates of mirror-image confusion in face perception.

Main Methods:

  • Utilized state-of-the-art multivariate pattern analysis (MVPA) with fMRI data.
  • Examined face-view tuning across different regions of the human visual cortex.
  • Compared neural representations of standard and mirror-symmetric face views.

Main Results:

  • Face view information was successfully decoded in early visual cortex, face-selective, and object-selective regions, supporting view-selective representations.
  • Critically, neural representations for mirror-symmetric views showed similarity in high-level visual areas, but not in low-level areas.
  • This indicates a gradual emergence of view invariance, with mirror-symmetry invariance as an intermediate stage.

Conclusions:

  • The findings support a hierarchical model of visual processing for face views in humans.
  • Mirror-symmetric view invariance appears as an intermediate step towards full view invariance.
  • The study proposes potential neural mechanisms underlying mirror-image confusion in human face perception.