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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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Somatosensory, Motor, and Association Cortex01:24

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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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Neural Circuits01:25

Neural Circuits

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Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
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Spinal Cord: Cross-sectional Anatomy01:16

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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...
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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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Visualization of Cortical Modules in Flattened Mammalian Cortices
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A spatially embedded cortical connectome reveals complex transformations.

Takuya Hayashi1, Henry Kennedy2, David C Van Essen3

  • 1Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, 6-7-3 MI R&D Center 3F, Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan; Department of Brain Connectomics, Kyoto University Graduate School of Medicine, Kyoto, Japan.

Neuron
|January 20, 2022
PubMed
Summary
This summary is machine-generated.

Researchers mapped the macaque prefrontal cortex using electrical microstimulation and functional MRI. They discovered a large-scale organization of association cortex domains, suggesting important functional roles.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience

Background:

  • The prefrontal cortex (PFC) plays a crucial role in higher cognitive functions.
  • Understanding the large-scale organization of the PFC and its connections is essential for deciphering complex brain functions.

Purpose of the Study:

  • To investigate the topographic organization and functional relationships within the macaque prefrontal cortex.
  • To map the spatial embedding of PFC domains and their connections to other association cortices.

Main Methods:

  • Electrical microstimulation of the macaque prefrontal cortex.
  • Simultaneous functional magnetic resonance imaging (fMRI) to record brain activity.
  • Analysis of weighted, orderly topographic relationships between cortical domains.

Main Results:

  • Detailed mapping of macaque prefrontal cortex organization.
  • Identification of spatially embedded, large-scale topographic relationships.
  • Demonstration of functional connections between PFC and other association cortex areas.

Conclusions:

  • The study reveals a significant large-scale organization within the macaque prefrontal cortex.
  • This spatially embedded organization is likely critical for the cognitive functions mediated by the PFC.
  • Findings provide a framework for understanding PFC circuitry and its role in cognition.