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Related Concept Videos

Somatosensory, Motor, and Association Cortex01:23

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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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Lobes of the Cerebrum01:22

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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
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Association Areas of the Cortex01:21

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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

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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.
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Cerebral Hemispheres01:05

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Somatosensation01:33

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Related Experiment Video

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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Task Context Overrules Object- and Category-Related Representational Content in the Human Parietal Cortex.

Stefania Bracci1, Nicky Daniels1, Hans Op de Beeck1

  • 1Laboratory of Biological Psychology, KU Leuven3000, Leuven, Belgium.

Cerebral Cortex (New York, N.Y. : 1991)
|January 22, 2017
PubMed
Summary

The parietal cortex, part of the dorsal visual stream, represents task-relevant object properties, not specific biases. It functions with frontal areas as a multiple-demand network for task-specific information.

Keywords:
dorsal streamfMRIobject representationsrepresentational similarity analysisventral stream

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Visual Perception

Background:

  • The dorsal visual stream, including parietal cortex, is involved in object perception.
  • The precise nature of object representations within the parietal cortex remains debated.
  • Hypotheses suggest parietal cortex may have specific representational biases or function as a general multiple-demand network with frontal areas.

Purpose of the Study:

  • To investigate whether the parietal cortex preferentially represents certain object properties (e.g., action) over others.
  • To determine if the parietal cortex forms a general multiple-demand network with frontal cortex, responding to task demands.
  • To differentiate between domain-specific biases and domain-general network functions in parietal object representations.

Main Methods:

  • A human neuroimaging study using functional magnetic resonance imaging (fMRI).
  • A stimulus set designed to dissociate object action from object category.
  • Task contexts were manipulated to be either action-related or category-related.

Main Results:

  • Parietal and prefrontal cortices represented task-relevant object properties (e.g., action in the action task).
  • Irrelevant object properties were not represented in parietal or prefrontal areas during the respective tasks.
  • Ventral visual areas represented irrelevant object properties, contrasting with parietal function.

Conclusions:

  • Human parietal cortex does not exhibit preferential representation of specific object properties independent of task demands.
  • Parietal cortex, alongside frontal areas, operates as a content-rich multiple-demand network.
  • This network dynamically represents task-relevant object properties based on current cognitive goals.