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 directly alters brain cell electrical activity and gene expression, proving these frequencies have biological effects despite industry claims of safety.

Plain English Summary

Summary written for general audiences

Researchers exposed mouse brain cells to terahertz radiation and found it increased the electrical activity between neurons and promoted the formation of myelin, the protective coating around nerve fibers. The study shows that terahertz waves, which sit between microwaves and infrared light on the electromagnetic spectrum, can alter how brain cells function and communicate. This research reveals that even non-ionizing radiation can directly modify neural activity and development at the cellular level.

Why This Matters

This study matters because it demonstrates that terahertz radiation, increasingly used in airport security scanners and proposed for 6G wireless networks, directly alters brain cell function. The researchers found increased neuronal firing and changes in gene expression after exposure, meaning these frequencies don't just pass through tissue harmlessly as industry often claims. The fact that different brain cells showed varying sensitivity to terahertz waves is particularly significant. It suggests cumulative effects on neural function that we're only beginning to understand.

While the researchers frame enhanced synaptic transmission and myelination as potentially therapeutic, the reality is more complex. Any technology that modulates brain activity carries risks when exposure is uncontrolled or involuntary. We've seen this pattern before with microwave frequencies, where initial optimism about biological effects gave way to concerns about chronic exposure. As terahertz applications expand, from body scanners to ultra-fast wireless communication, we're introducing another layer of electromagnetic exposure with documented biological activity. The science demonstrates clear cellular responses. What remains unknown is whether repeated, long-term exposure in real-world settings produces harmful cumulative effects on nervous system development and function.

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_ce3592,
  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

This study shows terahertz radiation increases electrical activity between brain cells and changes gene expression in mouse neurons. While airport scanners use brief exposures and researchers used cell cultures rather than whole organisms, the findings prove terahertz waves have measurable biological effects on nervous system tissue, contradicting assumptions that these frequencies are biologically inert.
Terahertz radiation sits between microwave and infrared frequencies on the electromagnetic spectrum. It's increasingly used in full-body airport security scanners, quality control imaging, and is proposed for future 6G wireless networks. Until recently, this frequency range was considered biologically inactive, but emerging research shows it interacts with cells and tissues in measurable ways.
Yes. Researchers found that terahertz laser exposure increased excitatory synaptic transmission and neuronal firing activities in mouse cortical neurons. The study also revealed changes in gene expression consistent with enhanced neural activity. This demonstrates that terahertz frequencies can directly modulate how brain cells communicate, raising questions about unintended effects from increasing environmental exposure.
The research showed that specific terahertz exposure schedules promoted the differentiation of oligodendrocyte precursor cells and enhanced the myelination process. Myelin forms the protective coating around nerve fibers. While researchers suggest therapeutic potential, the ability of terahertz waves to alter fundamental developmental processes in nervous system cells warrants careful evaluation before widespread deployment in consumer technologies.
No. This study found that different brain cell types showed varying sensitivity to terahertz radiation. Neurons experienced increased firing activity, while oligodendrocyte precursor cells showed inhibited proliferation and enhanced differentiation. This differential sensitivity means terahertz exposure could affect various aspects of nervous system function simultaneously, potentially creating complex and unpredictable biological responses in living organisms.