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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

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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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Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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....
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Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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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...
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Vision01:24

Vision

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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.
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Visual Agnosia01:12

Visual Agnosia

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Related Experiment Video

Updated: Mar 15, 2026

Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
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Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography

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Auditory and visual connectivity gradients in frontoparietal cortex.

Rodrigo M Braga1,2,3, Peter J Hellyer3,4, Richard J S Wise3

  • 1Center for Brain Science, Harvard University, Cambridge, Massachusetts.

Human Brain Mapping
|August 30, 2016
PubMed
Summary

The frontoparietal network shows distinct visual and auditory processing regions. This sensory modality encoding influences neural activity location within the brain.

Keywords:
auditoryconnectivityfrontoparietal cortexfunctionalfunctional magnetic resonance imaginggradientsresting-statestructuraltractograpyvisual

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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Related Experiment Videos

Last Updated: Mar 15, 2026

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • The frontoparietal network is involved in both auditory and visual processing.
  • Evidence suggests sensory function differentiation within this network.
  • Investigating modality-specific biases in frontoparietal connectivity is crucial.

Purpose of the Study:

  • To determine if distinct frontoparietal regions exhibit intrinsic connectivity biases towards visual or auditory modalities.
  • To map the spatial organization of sensory processing within the frontoparietal network.

Main Methods:

  • Utilized magnetic resonance imaging (MRI) in humans.
  • Assessed structural connectivity using diffusion tractography.
  • Tested functional connectivity with functional MRI.

Main Results:

  • Observed a dorsal-ventral gradient: dorsal regions showed stronger visual cortex connectivity, ventral regions showed stronger auditory cortex connectivity.
  • Identified posterior-anterior gradients with opposing directions in prefrontal and parietal cortices.
  • Demonstrated that stimulus modality spatially influences neural activity location in frontoparietal cortex.

Conclusions:

  • Neural activity location in frontoparietal cortex is influenced by stimulus modality and cognitive task demands.
  • Stimulus modality is spatially encoded across frontal and parietal cortices.
  • This spatial encoding may facilitate efficient top-down modulation of sensory information within higher-order cortex.