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Related Concept Videos

What is a Sensory System?01:31

What is a Sensory System?

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Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
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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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Spinal Cord: Information Processing01:10

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The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
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Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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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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Tactile and Chemical Senses01:27

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Related Experiment Video

Updated: Mar 3, 2026

Muscle Receptor Organs in the Crayfish Abdomen: A Student Laboratory Exercise in Proprioception
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What Do Sensory Organs Tell the Brain?

Avner Wallach1, Satomi Ebara2, Ehud Ahissar3

  • 1Department of Cellular and Molecular Medicine, Faculty of Medical Science and Department of Physics, Faculty of Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada.

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This study reveals new insights into active sensory coding by mechanoreceptors, advancing our understanding of how sensory organs acquire information for perception.

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Area of Science:

  • Neuroscience
  • Sensory Biology
  • Mechanotransduction

Background:

  • Perception relies on sensory acquisition by specialized organs.
  • Mechanoreceptors play a crucial role in sensing physical stimuli.
  • Understanding active sensory coding is key to deciphering neural processing.

Purpose of the Study:

  • To elucidate the mechanisms of active sensory coding in mechanoreceptors.
  • To advance the understanding of how sensory information is acquired and processed.
  • To provide a foundation for future research in sensory neuroscience.

Main Methods:

  • Investigated the dynamic properties of mechanoreceptor responses.
  • Utilized advanced electrophysiological techniques.
  • Analyzed neural coding strategies during active sensing.

Main Results:

  • Demonstrated a novel mechanism for active sensory coding in mechanoreceptors.
  • Identified specific neural strategies employed by these sensory receptors.
  • Highlighted the importance of efference copy in sensory processing.

Conclusions:

  • The findings represent a significant advancement in understanding active sensory coding.
  • This research deepens our knowledge of sensory acquisition and perception.
  • Offers new perspectives on the neural basis of sensory information processing.