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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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. This...
Sensory Modalities01:15

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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
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Somatosensation01:33

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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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The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
Sensory Functions of the Skin01:16

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Related Experiment Video

Updated: Jul 5, 2026

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Tactile intensity and population codes.

Sliman J Bensmaia1

  • 1Krieger Mind/Brain Institute, Johns Hopkins University, Baltimore, MD 21218, United States. sliman@jhu.edu

Behavioural Brain Research
|April 19, 2008
PubMed
Summary
This summary is machine-generated.

Neural processing of touch intensity involves integrating information across different neuron types and sensory submodalities. This convergence creates a unified perception of stimulus intensity, even across distinct sensory channels.

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Area of Science:

  • Neuroscience
  • Sensory coding
  • Computational neuroscience

Background:

  • Understanding neural processing of sensory information is crucial.
  • The peripheral neural code for perceived stimulus intensity in touch is not fully understood.
  • Existing models often consider sensory channels separately.

Purpose of the Study:

  • To review studies on the peripheral neural code for perceived intensity in touch.
  • To explore how information is integrated across neuronal populations and submodalities.
  • To discuss implications for intensity coding models and cortical processing.

Main Methods:

  • Review of existing literature on neural coding of touch intensity.
  • Analysis of studies investigating population coding in afferent neurons.
  • Examination of cross-modality integration in sensory perception.

Main Results:

  • Stimulus intensity is encoded in the activity of neuronal populations.
  • Information is integrated across afferents of the same type.
  • Information is combined across different submodalities for a unified percept.

Conclusions:

  • Convergence of information across submodalities is key for intensity perception.
  • This challenges the notion of strictly parallel and independent sensory channels.
  • Proposed models offer insights into psychophysical functions and cortical intensity coding.