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Related Concept Videos

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.
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...
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,...
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.
Somatosensation01:33

Somatosensation

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.
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

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.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...

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Related Experiment Video

Updated: Jun 30, 2026

Corticospinal Excitability Modulation During Action Observation
12:33

Corticospinal Excitability Modulation During Action Observation

Published on: December 31, 2013

Emerging views of corticothalamic function.

Farran Briggs1, W Martin Usrey

  • 1Department of Neurobiology, Physiology & Behavior, Center for Neuroscience, University of California, Davis, CA, United States.

Current Opinion in Neurobiology
|September 23, 2008
PubMed
Summary
This summary is machine-generated.

Corticothalamic feedback significantly shapes sensory processing by altering thalamic neuron receptive fields and information transmission. This highlights the thalamus and cortex as an interconnected circuit crucial for sensory perception.

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Last Updated: Jun 30, 2026

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Area of Science:

  • Neuroscience
  • Sensory Processing
  • Computational Neuroscience

Background:

  • The thalamus was traditionally viewed as a passive relay for sensory information to the cortex.
  • Emerging evidence suggests a more active role for the thalamus in sensory processing.

Purpose of the Study:

  • To elucidate the functional impact of corticothalamic feedback on sensory information processing.
  • To emphasize the integrated nature of thalamo-cortical interactions.

Main Methods:

  • Review of recent studies across various sensory systems and species.
  • Analysis of experimental results demonstrating feedback effects on neuronal properties and information flow.

Main Results:

  • Corticothalamic feedback modulates the receptive fields of thalamic neurons.
  • Feedback influences the transmission of sensory signals between the thalamus and cortex.
  • These effects are observed across different sensory modalities and species.

Conclusions:

  • The corticothalamic projection is not a unidirectional pathway but an integral component of a dynamic thalamo-cortico-thalamic circuit.
  • Understanding sensory processing requires considering the intricate interplay between the thalamus and cortex.