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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.
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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Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

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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.
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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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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Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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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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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: Dec 11, 2025

Flat-floored Air-lifted Platform: A New Method for Combining Behavior with Microscopy or Electrophysiology on Awake Freely Moving Rodents
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Neuronal Circuits in Barrel Cortex for Whisker Sensory Perception.

Jochen F Staiger1, Carl C H Petersen1

  • 1University Medical Center Göttingen, Institute for Neuroanatomy, Göttingen, Germany; and Laboratory of Sensory Processing, Faculty of Life Sciences, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

Physiological Reviews
|August 21, 2020
PubMed
Summary

Rodents use facial whiskers for tactile sensing and navigation. Neuronal computations in the whisker somatosensory cortex (wS1) process this sensory information, enabling sophisticated behaviors.

Keywords:
GABAergic neuronsbarrel cortexprincipal cellssensory perceptionsynaptic circuits

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Functional Magnetic Resonance Spectroscopy at 7 T in the Rat Barrel Cortex During Whisker Activation
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Area of Science:

  • Neuroscience
  • Sensory Biology
  • Computational Neuroscience

Background:

  • Rodents utilize facial whiskers for tactile sensory input, crucial for environmental interaction.
  • Whisker-mediated sensation is processed in the whisker somatosensory cortex (wS1), featuring a precise somatotopic map called the barrel cortex.
  • Understanding neuronal computations within wS1 is key to deciphering tactile sensory processing.

Purpose of the Study:

  • To review signaling pathways from whiskers to wS1.
  • To discuss neuronal types and connectivity within wS1.
  • To highlight recent advances and future directions in understanding wS1 function.

Main Methods:

  • Review of existing literature on whisker sensory pathways.
  • Analysis of anatomical, electrophysiological, and molecular classifications of wS1 neurons.
  • Integration of recent technological findings relating cell-type-specific activity to behavior.

Main Results:

  • Detailed description of whisker-to-wS1 signaling pathways.
  • Classification of diverse excitatory and inhibitory neuron types in wS1.
  • Emerging understanding of local and long-range neuronal connectivity and neuromodulation in wS1.

Conclusions:

  • wS1 integrates tactile information through specific neuronal circuits.
  • Advances in technology allow linking neuronal activity to whisker-dependent behaviors.
  • Future research aims for a causal understanding of wS1's role in sensory-guided decision-making.