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The Role of Glutamatergic Neurons in Changes of Synaptic Plasticity Induced by THz Waves

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Authors not listed · 2025

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One hour of 1.94 THz wave exposure significantly impaired synaptic plasticity and glutamatergic neuron function in mouse brain tissue, raising concerns about emerging terahertz technologies.

Plain English Summary

Summary written for general audiences

Researchers exposed mouse brain tissue to 1.94 THz (terahertz) waves for one hour and found significant damage to brain cell connections and communication. The study showed these waves reduced the activity of glutamatergic neurons (brain cells that use glutamate for signaling) and impaired synaptic plasticity, which is essential for learning and memory. Artificially stimulating these neurons helped reverse the damage, suggesting potential protective strategies.

Why This Matters

This study matters because terahertz frequencies are increasingly used in security scanners, wireless communications, and medical imaging, yet we know remarkably little about their biological effects. The science demonstrates that even brief THz exposure can measurably impair the mechanisms underlying learning and memory in brain tissue. The researchers found reduced neural excitability, altered synaptic structure, and suppressed glutamate signaling, all critical for normal brain function.

What makes this research particularly significant is that it identifies a specific mechanism of harm involving NMDA receptors and offers potential mitigation strategies. The reality is that as THz technology expands into 6G networks and body scanners, we're moving forward with deployment while the neuroscience suggests caution. The fact that artificially stimulating affected neurons could reverse some damage is scientifically interesting, but it doesn't justify dismissing the initial harm. You don't have to accept increased exposure to emerging frequencies without demanding proper safety testing first.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2025). The Role of Glutamatergic Neurons in Changes of Synaptic Plasticity Induced by THz Waves.
Show BibTeX
@article{the_role_of_glutamatergic_neurons_in_changes_of_synaptic_plasticity_induced_by_thz_waves_ce3502,
  author = {Unknown},
  title = {The Role of Glutamatergic Neurons in Changes of Synaptic Plasticity Induced by THz Waves},
  year = {2025},
  doi = {10.3390/biom15040532},
  
}
DOI: 10.3390/biom15040532PubMed: 40181189

Quick Questions About This Study

The study exposed mouse brain slices to 1.94 THz (terahertz) waves for one hour. This frequency falls in the terahertz range between millimeter waves and infrared light, increasingly used in security scanners, wireless communications, and emerging 6G technology. The specific frequency allowed researchers to examine how THz radiation affects brain cell connections.
Exposure to 1.94 THz waves reduced synaptic plasticity markers including field excitatory postsynaptic potential slope, increased postsynaptic density thickness, and decreased expression of proteins essential for neural connections. These changes indicate impaired ability of brain synapses to strengthen or weaken over time, a process critical for learning and memory formation.
Glutamatergic neurons are brain cells that communicate using glutamate, the primary excitatory neurotransmitter. This study found THz waves specifically reduced their activity and excitability in the hippocampus. Since these neurons are essential for learning, memory, and overall brain function, their impairment suggests THz exposure could affect cognitive processes requiring synaptic plasticity.
Researchers found that artificially activating glutamatergic neurons using optogenetics and chemogenetics, or overexpressing the GluN2B receptor subunit, partially reversed the synaptic damage from THz exposure. While this suggests potential therapeutic approaches, it doesn't eliminate concerns about initial harm. Prevention remains preferable to needing intervention after exposure occurs.
Currently, 1.94 THz frequencies appear primarily in airport security scanners, some medical imaging systems, and experimental wireless communications. Terahertz technology is being developed for 6G networks, high-speed data transfer, and various scanning applications. While not yet widespread in consumer devices, deployment is expanding, making this research on biological effects particularly timely.