Scientists Explore the Potential of Axons to Transmit Light in Neurons

Neurons primarily communicate through electrical pulses, but recent findings suggest they may also transmit light. A researcher from the University of Rochester has embarked on an ambitious project to investigate whether live neurons can convey light through their axons.

The nervous system is one of the most complex outcomes of biological evolution, with its efficacy largely dependent on the principles of action potentials.

Numerous studies have examined the role of photons in neural communication, presenting evidence for photon migration through axons, which are long, tail-like structures of neurons that resemble optical fibers.

“While several scientific papers suggest the possibility of light transmission in neuronal axons, definitive experimental evidence is still lacking,” stated Professor Pablo Posgo from the University of Rochester.

“Researchers have demonstrated ultra-weak photon emissions in the brain, but the reasons behind their presence remain unclear.”

If the role of light can be deciphered, it may significantly influence the medical treatment of brain disorders and revolutionize approaches to neurological healing.

However, measuring optical transport between neurons presents challenges.

“Neuronal axons are narrower than 2 microns, meaning that nanophotonic techniques are essential for evaluating their optical properties,” explained Professor Posigo.

“If light transmission occurs, it may involve extremely low light levels, potentially as little as a single photon.”

Professor Postigo and his team will create probes designed to optically interact with living neurons.

“We utilize photonic nanoprobes to inject light into neuronal axons and detect subsequent photons,” they explained.

“If neuronal axons can transport light, we will measure the light’s wavelength and intensity.”