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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.
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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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Lateralization01:28

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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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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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Role of Cerebellum and Prefrontal Cortex in Memory01:14

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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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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.
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Continuous Theta Burst Stimulation of the Posterior Medial Frontal Cortex to Experimentally Reduce Ideological Threat Responses
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Subspecialization in the human posterior medial cortex.

Danilo Bzdok1, Adrian Heeger2, Robert Langner1

  • 1Institute of Neuroscience and Medicine (INM-1), Research Center Jülich, Jülich, Germany; Institute of Clinical Neuroscience and Medical Psychology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.

Neuroimage
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

This study reveals distinct functional regions within the posterior medial cortex (PMC). These areas show unique connectivity patterns and are involved in diverse cognitive processes like attention, language, and decision-making.

Keywords:
Connectivity-based parcellationDefault mode networkFunctional decodingParietal lobePosterior cingulate cortexRetrosplenial cortexStatistical learning

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience

Background:

  • The posterior medial cortex (PMC) is a poorly understood brain region.
  • Its neural activity is linked to various disparate mental processes, necessitating further investigation.

Purpose of the Study:

  • To investigate the properties of the posterior medial cortex (PMC) using a data-driven, exploratory approach.
  • To delineate distinct functional subregions within the PMC and characterize their neural networks and functional roles.

Main Methods:

  • Subdivided the PMC based on whole-brain coactivation profiles.
  • Compared functional connectivity using task-constrained meta-analytic coactivation mapping (MACM) and task-unconstrained resting-state correlations (RSFC).
  • Functionally described PMC regions through forward/reverse functional inference.

Main Results:

  • Identified distinct PMC clusters: precuneal (attention, motor tasks), ventral PCC (facial appraisal, language), dorsal PCC (delay discounting), and retrosplenial cortex (thalamus, hippocampus).
  • All PMC clusters showed coupling with the default mode network in resting-state but not task-constrained connectivity.

Conclusions:

  • The PMC is comprised of functionally distinct regions with specific neural networks.
  • These regions are implicated in a range of cognitive functions, contributing to our understanding of brain organization.