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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Related Experiment Video

Updated: Jun 4, 2025

Using Facial Electromyography to Assess Facial Muscle Reactions to Experienced and Observed Affective Touch in Humans
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Thermoelectric Gel Enabling Self-Powered Facial Perception for Expression Recognition and Health Monitoring.

Xiaojing Cui1,2, Yuyou Nie1, Saeed Ahmed Khan3

  • 1School of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China.

ACS Sensors
|December 27, 2024
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Summary

A new self-powered gel patch uses facial thermoelectric variations for real-time emotion and health monitoring. This wearable bioelectronic device achieves high accuracy in expression recognition and disease detection.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Wearable Technology

Background:

  • Facial perception is crucial for noninvasive, real-time disease diagnosis and health monitoring.
  • Current facial perception methods face limitations due to structural complexity and power supply requirements, hindering timely monitoring.
  • There is a need for advanced, self-powered solutions for continuous and accurate facial activity monitoring.

Purpose of the Study:

  • To develop a self-powered, flexible thermoelectric gel patch for facial perception.
  • To enable real-time monitoring of emotions and atypical pathological states using facial signals.
  • To advance the field of intelligent wearable bioelectronics for physiological monitoring.

Main Methods:

  • Fabrication of a self-powered poly(vinyl alcohol)-gellan gum-glycerol thermogalvanic gel patch.
  • Utilizing the patch's high thermopower (1.89 mV/K) and stretchability (680%) for facial thermoelectric variation detection.
  • Employing machine learning algorithms for real-time analysis of facial muscle activities.

Main Results:

  • The thermoelectric gel patch accurately perceives facial activities from 11 muscles in real time.
  • Achieved 98% accuracy in expression recognition and 96% accuracy in health monitoring.
  • Demonstrated the potential for on-face conformation and operation based on facial thermoelectric variations.

Conclusions:

  • The developed gel patch offers a promising strategy for actively monitoring multisite physiological activities.
  • This innovation advances the development of intelligent wearable bioelectronics for physical and mental health monitoring.
  • The self-powered, flexible nature of the patch overcomes limitations of existing facial perception technologies.