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Related Concept Videos

Somatosensory, Motor, and Association Cortex01:23

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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Sensory Perception: Organization of the Somatosensory System01:11

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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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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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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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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Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Related Experiment Video

Updated: Mar 2, 2026

Modeling the Functional Network for Spatial Navigation in the Human Brain
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Surround Integration Organizes a Spatial Map during Active Sensation.

Scott R Pluta1, Evan H Lyall2, Greg I Telian3

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.

Neuron
|May 16, 2017
PubMed
Summary
This summary is machine-generated.

Surround whiskers transform the brain's representation of scanned space. This input organizes neural activity into a map, crucial for how we perceive the world through touch.

Keywords:
active sensationbarrel cortexcalcium imagingelectrophysiologyreceptive fieldsensory mapthalamuswhisker

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Area of Science:

  • Neuroscience
  • Sensory Systems
  • Computational Neuroscience

Background:

  • Spatial coding in sensory systems is typically studied using fixed coordinate frames.
  • The cortical representation of actively scanned space remains poorly understood.

Purpose of the Study:

  • To investigate how surround whiskers influence spatial coding during active touch.
  • To understand the cortical representation of scanned space in the rodent whisker system.

Main Methods:

  • Utilized two-photon imaging and electrophysiology in rodents.
  • Probed spatial coding during active touch and whisker movement.

Main Results:

  • Surround whisker input significantly alters neuronal response amplitude and spatial preference.
  • Population-level analysis revealed a continuous map of scanned space organized by neuronal preferences.
  • Demonstrated the transformative effect of surround input on cortical representations.

Conclusions:

  • Surround input is critical for dynamically transforming cortical representations of scanned space.
  • Spatial summation across a moving sensor array is essential for population coding of sensory environments.
  • Findings provide insights into neural mechanisms underlying active sensation and spatial perception.