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Related Concept Videos

Sensory Modalities01:15

Sensory Modalities

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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.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
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Overview of Somatic Sensory Pathways01:29

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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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Taste Buds and Receptors01:20

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Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
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Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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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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Introduction to Sensory Receptors01:31

Introduction to Sensory Receptors

3.8K
Sensory receptors are vital in our ability to perceive and interpret the world. Sensory receptors are specialized cells in the peripheral nervous system that respond to various stimuli and enable one to experience different sensations. Based on specific criteria, sensory receptors are classified into distinct types.
The first classification criterion is based on cell type, position, and function. Some receptor cells are neurons with free nerve endings, where their dendrites are embedded in the...
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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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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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Dynamic Quantitative Sensory Testing to Characterize Central Pain Processing
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Lessons learned - Moving on from QST sensory profiles.

Martin Schmelz1

  • 1Department of Experimental Pain Research, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.

Scandinavian Journal of Pain
|September 21, 2022
PubMed
Summary

Quantitative sensory testing (QST) aids small fiber neuropathy diagnosis. However, current sensory phenotypes fail to differentiate pain in neuropathy patients, necessitating new diagnostic strategies.

Keywords:
evoked painneuropathypain mechanismquantitative sensory testingstratification

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Area of Science:

  • Neurology
  • Pain Medicine
  • Neurophysiology

Background:

  • Quantitative sensory testing (QST) is a validated diagnostic tool for small fiber neuropathy.
  • Sensory phenotypes derived from QST data have been explored for chronic pain patient stratification.
  • Decades of QST use have established its role in diagnosing neurological conditions.

Purpose of the Study:

  • To evaluate the efficacy of current sensory phenotypes in stratifying chronic pain patients with neuropathy.
  • To investigate the utility of QST-derived sensory phenotypes for gaining mechanistic insights into neuropathic pain.
  • To determine if distinct sensory phenotypes differentiate neuropathy patients with and without pain.

Main Methods:

  • Analysis of existing quantitative sensory testing (QST) data.
  • Comparison of sensory phenotypes between neuropathic pain patients and non-pain controls.
  • Statistical evaluation of stratification success based on current sensory phenotypes.

Main Results:

  • Studies consistently reveal no significant difference in sensory phenotypes between neuropathy patients with and without pain.
  • Current "sensory phenotypes" have not demonstrated successful patient stratification.
  • The initial hypothesis regarding the utility of current sensory phenotypes for pain stratification was falsified.

Conclusions:

  • The current approach of using "sensory phenotypes" derived from QST data is insufficient for stratifying neuropathic pain patients.
  • There is a need to develop and explore novel approaches beyond the current sensory phenotypes for understanding and managing neuropathic pain.
  • Future research should focus on alternative methods to gain mechanistic insights and improve patient stratification in small fiber neuropathy and chronic pain.