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Related Concept Videos

Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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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 Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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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.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
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Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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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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Related Experiment Video

Updated: Jan 3, 2026

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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The Critically Tuned Cortex.

John M Beggs1

  • 1Indiana University Department of Physics, 727 East 3(rd) Street, Bloomington, IN 47405-7105, USA.

Neuron
|November 22, 2019
PubMed
Summary
This summary is machine-generated.

The brain

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Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • The criticality hypothesis posits that the brain operates at a critical point for optimal information processing.
  • Understanding how the brain maintains this critical state is crucial for comprehending neural function.

Purpose of the Study:

  • To investigate the brain's ability to tune itself to criticality.
  • To examine the resilience of this tuning mechanism against perturbations.

Main Methods:

  • The study by Ma et al. (2019) provides evidence for a self-tuning mechanism in the cortex.
  • This mechanism maintains criticality despite significant disturbances over an extended period.

Main Results:

  • Evidence suggests the cortex actively tunes itself towards a critical state.
  • This tuning persists even when subjected to strong perturbations for several days.

Conclusions:

  • The findings support the criticality hypothesis for optimal brain function.
  • The cortex possesses a robust mechanism for maintaining criticality, crucial for information processing.