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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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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.
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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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Major Somatic Sensory Pathways01:28

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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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Overview of Somatic Sensory Pathways01:29

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Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
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Related Experiment Video

Updated: Dec 28, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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The role of the posterior parietal cortex in saccadic error processing.

Jérôme Munuera1,2,3, Jean-René Duhamel4

  • 1Institut Des Sciences Cognitives Marc Jeannerod, Centre National de La Recherche Scientifique, UMR 5229, Bron, France. jerome.munuera@icm-institute.org.

Brain Structure & Function
|February 18, 2020
PubMed
Summary

The lateral intraparietal area (LIP) plays a crucial role in detecting and correcting eye movement errors. Neurons in LIP signal inaccuracies in saccades, influencing corrective eye movements.

Keywords:
MuscimolNeurophysiologyNon-human primateOculomotor controlParietal cortex

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Area of Science:

  • Neuroscience
  • Oculomotor Systems
  • Visual Perception

Background:

  • Ocular saccades are essential for continuous visual perception but are prone to errors due to sensory-motor variability.
  • Corrective saccades are initiated to fix saccadic inaccuracies, relying on both retinal feedback and internal signals.
  • The neural basis for saccadic error processing remains incompletely understood.

Purpose of the Study:

  • To investigate the neurophysiological mechanisms of saccadic error processing.
  • To identify the role of the lateral intraparietal area (LIP) in detecting and correcting saccadic errors.

Main Methods:

  • Training rhesus monkeys to perform visually guided saccades with imperceptible target displacements.
  • Recording neuronal activity in the LIP during saccade tasks.
  • Inactivating LIP to observe effects on corrective saccade initiation.

Main Results:

  • A subpopulation of LIP neurons exhibited increased firing after inaccurate saccades, indicating error detection.
  • This error- signaling mechanism in LIP was independent of retinal feedback and corrective saccade execution.
  • LIP inactivation selectively increased the latency of initiating small, natural corrective saccades.

Conclusions:

  • The lateral intraparietal area (LIP) is critically involved in processing saccadic motor errors.
  • LIP contributes to the rapid initiation of corrective saccades following inaccurate eye movements.