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Thermosensation

Thermosensation

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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Artificial Photothermal Nociceptor Using Mott Oscillators.

Pyeongkang Hur¹, Daseob Yoon², Minwook Yoon^3,4,5

¹Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37683, Republic of Korea.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|December 18, 2024

Summary

This summary is machine-generated.

Researchers developed Mott oscillative spike neurons that integrate sensing and spike generation. These bioinspired devices mimic biological thermal nociceptors, enabling efficient adaptive sensory systems.

Keywords:

artificial nociceptor metal‐insulator transition neuron oscillator oxide

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Area of Science:

Neuroscience
Materials Science
Engineering

Background:

Current sensory systems face challenges with high energy consumption and limited bandwidth.
Bioinspired sensory systems utilizing spike neural networks offer a promising solution.
Compact neuron devices are needed for efficient signal detection and spike encoding.

Purpose of the Study:

To demonstrate Mott oscillative spike neurons for integrated sensing and spike generation.
To emulate photothermal sensing and features of biological photothermal nociceptors.
To develop adaptive sensory systems with efficient environmental data encoding.

Main Methods:

Fabrication of compact Mott oscillative spike neurons.
Integration of sensing and ceaseless spike generation within a single device.
Characterization of photothermal sensing and spike generation under varying stimuli intensities.

Main Results:

Mott neurons successfully integrated sensing and spike generation, mimicking biological photothermal nociceptors.
Frequency-tunable and repetitive spikes were generated above a threshold (84 mW cm⁻²).
Neuron devices replicated frequency coding, startup latency, allodynia, and hyperalgesia.

Conclusions:

Mott oscillative spike neurons offer a compact solution for bioinspired sensory systems.
These neurons effectively capture and encode environmental data into spikes.
The study presents a novel approach for adaptive sensory systems with enhanced efficiency.