8,655 Studies Reviewed. 86.9% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

Terahertz exposure enhances neuronal synaptic transmission and oligodendrocyte differentiation in vitro

Bioeffects Seen

Zhao X, Zhang M, Liu Y, Liu H, Ren K, Xue Q, Zhang H, Zhi N, Wang W, Wu S · 2021

Share:

Terahertz radiation demonstrably alters brain cell function and development, raising urgent questions about the safety of expanding THz technologies before biological effects are fully understood.

Plain English Summary

Summary written for general audiences

Researchers exposed mouse brain cells to terahertz frequency electromagnetic radiation in laboratory dishes and observed increased activity in synapses (connections between nerve cells) and changes in cells that produce myelin, the protective coating around nerves. The terahertz waves altered gene expression in these cells and affected their development and function. This study demonstrates that even lesser-studied frequencies in the electromagnetic spectrum can significantly influence nervous system cell behavior.

Why This Matters

This study matters because terahertz frequencies represent a rapidly expanding frontier in wireless technology, from airport body scanners to next-generation 6G networks, yet we know surprisingly little about their biological effects. The finding that THz exposure can alter fundamental neurological processes like synaptic transmission and myelination should give us serious pause as we rush to deploy these technologies. What we're seeing here is direct evidence that electromagnetic fields in this frequency range interact with nervous system cells in measurable ways, changing how they function and develop.

The researchers describe these effects in positive terms, suggesting THz could be used for neuromodulation, but that framing misses the larger point. If THz exposure can enhance synaptic activity and alter oligodendrocyte development in ways researchers intentionally triggered, it can also do so in ways we don't intend or understand. The study used controlled laboratory conditions with known exposure parameters. Real-world THz exposure from scanning devices and future wireless infrastructure will be far less controlled, occurring without informed consent in populations that include developing children whose nervous systems are particularly vulnerable. The fact that different cell types showed different sensitivities to THz exposure suggests complex biological interactions we're only beginning to map.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Zhao X, Zhang M, Liu Y, Liu H, Ren K, Xue Q, Zhang H, Zhi N, Wang W, Wu S (2021). Terahertz exposure enhances neuronal synaptic transmission and oligodendrocyte differentiation in vitro.
Show BibTeX
@article{zhao_x_zhang_m_liu_y_liu_h_ren_k_xue_q_zhang_h_zhi_n_wang_w_wu_s_ce3124,
  author = {Zhao X and Zhang M and Liu Y and Liu H and Ren K and Xue Q and Zhang H and Zhi N and Wang W and Wu S},
  title = {Terahertz exposure enhances neuronal synaptic transmission and oligodendrocyte differentiation in vitro},
  year = {2021},
  doi = {10.1016/j.isci.2021.103485},
  
}
DOI: 10.1016/j.isci.2021.103485PubMed: 34927027

Quick Questions About This Study

Terahertz (THz) frequencies fall between microwave and infrared radiation on the electromagnetic spectrum. They're currently used in airport body scanners, some medical imaging devices, and quality control systems. Technology developers are also exploring THz for 6G wireless networks and high-speed data transmission, which would dramatically increase population-wide exposure to these frequencies.
The THz radiation increased excitatory synaptic transmission between neurons and enhanced their firing activity. It also changed gene expression patterns in these cells. Additionally, THz exposure affected oligodendrocyte precursor cells by inhibiting their multiplication while promoting their development into mature cells that produce myelin, accelerating the overall myelination process in the cell cultures.
Yes. This study demonstrates that terahertz frequency radiation can modify synaptic transmission, the fundamental process by which nerve cells communicate with each other. The exposure increased excitatory signals between neurons and changed their firing patterns. These alterations occurred at the cellular level through changes in gene expression, showing that EMF exposure can influence basic neurological function.
Myelin is the protective fatty coating that wraps around nerve fibers, allowing electrical signals to travel quickly and efficiently. The study found THz exposure enhanced myelination by altering how oligodendrocytes (the cells that make myelin) develop. Since proper myelination is critical for nervous system function and disruptions are linked to neurological disorders, THz effects on this process warrant serious investigation.
Yes. The researchers specifically noted that different neuronal cell types showed different sensitivities to THz exposure. Neurons displayed increased synaptic activity and firing, while oligodendrocyte precursor cells showed reduced proliferation but enhanced differentiation. This variable sensitivity suggests THz radiation has complex, cell-type-specific effects on nervous system tissue that we don't yet fully understand.