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Related Concept Videos

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,...
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.
Cerebral Hemispheres01:05

Cerebral Hemispheres

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...
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...
Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Related Experiment Video

Updated: Jun 5, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
07:03

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

Published on: July 31, 2019

Input-dependent directionality of interactions between cortical areas.

Francesca Mastrogiuseppe1,2, Joana Carmona1, Byron M Yu3

  • 1Champalimaud Neuroscience Programme, Champalimaud Foundation, Lisbon, Portugal.

Biorxiv : the Preprint Server for Biology
|June 4, 2026
PubMed
Summary
This summary is machine-generated.

Brain circuit mechanisms for flexible signal flow are revealed by recurrent network models. Common inputs and internal timescales shape directional interactions between brain areas, explaining dynamic shifts in neural activity.

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Related Experiment Videos

Last Updated: Jun 5, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
07:03

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

Published on: July 31, 2019

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
09:48

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

Published on: September 11, 2017

Double In Utero Electroporation to Target Temporally and Spatially Separated Cell Populations
10:45

Double In Utero Electroporation to Target Temporally and Spatially Separated Cell Populations

Published on: June 14, 2020

Area of Science:

  • Computational Neuroscience
  • Systems Neuroscience
  • Neural Circuits

Background:

  • Understanding brain function requires tracking signal flow across neural areas.
  • Rapid shifts in activity directionality with task demands are observed, but underlying circuit mechanisms are unclear.

Purpose of the Study:

  • Investigate how directional interactions emerge and are reconfigured in multi-area cortical circuits using recurrent network models.
  • Elucidate the circuit mechanisms governing dynamic changes in signal flow between brain areas.

Main Methods:

  • Utilized recurrent network models to simulate multi-area cortical circuits.
  • Analyzed how common inputs, recurrent connectivity, and internal timescales influence directional interactions.
  • Examined the role of inputs to excitatory versus inhibitory populations.

Main Results:

  • Directionality is shaped by the alignment of common inputs with recurrent connectivity and internal activity timescales.
  • In balanced circuits, inputs to excitatory populations predominantly control directionality.
  • These inputs govern latent signals reflecting widespread, coherent activity fluctuations across areas.

Conclusions:

  • Established a mechanistic framework for dynamic signal flow changes between brain areas.
  • Models capture cross-covariance features from primate V1 and V2, suggesting parsimonious mechanisms for observed directionality shifts.