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Related Concept Videos

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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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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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:
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Parallel Processing01:20

Parallel Processing

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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...
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Related Experiment Video

Updated: Jan 4, 2026

Transferring Cognitive Tasks Between Brain Imaging Modalities: Implications for Task Design and Results Interpretation in fMRI Studies
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Movement and Performance Explain Widespread Cortical Activity in a Visual Detection Task.

David B Salkoff1, Edward Zagha2, Erin McCarthy3

  • 1Department of Neuroscience, Yale University School of Medicine, New Haven, CT 06510, USA.

Cerebral Cortex (New York, N.Y. : 1991)
|November 12, 2019
PubMed
Summary
This summary is machine-generated.

Cortical activity during a visual task is largely explained by mouse movements and arousal. The secondary motor cortex specifically predicts licking, suggesting its role in learned motor control.

Keywords:
GCaMP6choice probabilitydecision-makingsensorimotor transformationvariability

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Computational Neuroscience

Background:

  • Widespread cortical activity is observed during task performance in mice.
  • The underlying task-related and independent processes driving this activity remain unclear.

Purpose of the Study:

  • To investigate the relationship between cortical activity, movements, arousal, and task performance in mice.
  • To determine the predictive power of behavioral variables on neural activity.

Main Methods:

  • Recorded wide-field neural activity (GCaMP6s) from the dorsal cortex of head-fixed mice.
  • Simultaneously monitored orofacial movements, walking, and pupil diameter during a Go/NoGo visual detection task.
  • Utilized a linear model to assess the contribution of behavioral factors to cortical activity.

Main Results:

  • A linear model explained 33-55% of cortical activity variance, primarily driven by movements (facial, walking, eye), response choice, and arousal.
  • Significant trial-to-trial variability in cortical activity was linked to spontaneous and task-related state changes.
  • Secondary motor cortex showed high correlation with lick rate and was the first region to predict licking on target trials.

Conclusions:

  • Cortical activity variations are substantially influenced by spontaneous and task-related movements, as well as arousal levels.
  • The secondary motor cortex plays a critical role in the decision and execution of learned movements, particularly licking.