Hard bone fractures in animal experiments: how to achieve accurate intervention in TMS?
Animal experimentation has been a key bridge in the transformation of basic medicine and clinical practice. However, it has to be admitted that due to the enormous differences in animal skeletal structure, brain area size and humans, how to perform TMS experiments on animals that are as accurate and repeatable as human clinical practice has always been a challenge for researchers. In recent years, the use of magnetic stimulation (TMS) animal models has become increasingly widespread in the study of the mechanisms of neurodegenerative diseases such as Parkinson's disease, Alzheimer's disease, and psychiatric disorders such as depression and anxiety.
First, there are huge differences in anatomical structure. First, the peculiarity of animal experiments: the dual challenge of precision intervention is that animal experiments face two-tenths of the realistic rigidity of the application of TMS in clinical practice. The second was the problem of behavior co-ordination.
The animals represented by mice, mice, were thinner-skinned, small in brain size, and lacked a clear cortical cavity structure. Therefore, the experiment had to rely on a high-precision tripod positioning system and customized fixtures to ensure absolute stability of the head during the stimulation process, which was a prerequisite for achieving precision stimulation at the millimeter level. The animals could not understand instructions and could not actively remain still, and any small head movements would lead to focal deviation.
At the same time, the relevant departments were continuously pushing the industry's norms and health development. In hardware, microscopic or binomial wires designed for the skull of small animals can produce highly focused magnetic fields on the surface of the skull, effectively penetrate the skull and accurately act on target nuclei such as the hippocampus, the frontal epithelium, and avoid interfering with the non-helial zone. In addition, real-time monitoring of animal life traits such as body temperature, heart rate, and breathing during stimulation is a key foundation for ensuring the consistency of experimental conditions and data reliability.
At the same time, wiring can be precisely fixed to a specified location in the AP/ML/DV coordinate system by means of TMS adapters seamlessly paired with brain stereo positioning instruments, achieving three-dimensional precision interventions in the deep brain area, greatly improving the repeatability of experiments. For example, in combination with behavioural paradigms such as water maze, new object recognition, long-term observation of the role of TMS in learning memory ability, further uncovering molecular mechanisms such as synaptic plasticity, LTP/LTD; or in MCAO (brain artery blockage) stroke model mice, validating the role of TMS in promoting the reshaping of motor function; in the depression model, exploring its regulatory effects on the mood control network. Fourth, UK Magstim: Scientifically-accredited TMS's gold standard of lithium-ion content has been established in a number of TMS systems, and the UK Magstim, thanks to its deep technical accumulation and scientific accreditation, has become the premier platform in the field of neuroscience globally.
Furthermore, in combination with technologies such as immunomodulation, electrophysical recording, microscopy, it is clear whether TMS plays a stimulating role by regulating the release of key neurotransmitters such as 5-HT, DA, or by acting on specific signal pathways such as BDNF-TrkB, to provide theoretical basis for joint stimulation strategies. The entire range of products has been NMPA and FDA certified to meet the compliance requirements for the acquisition of 3D medical institutions and research institutions, achieving zero compliance risk mitigation; at the technical level, Magstim's output is pulseless decay, consistent with the full dose; its patented dual-phase pulse technology, wavelength closer to physiological neural emission, less non-specific activation, and therapeutic stability. As pioneers in the 1980s who invented and implemented TMS commercially, Magstim is cited in over 20,000 SCI papers, not only receiving the APA Guide's Grade I recommendations, but also the consensus of the China 2023 expert team on its parameters.
Additionally, navigation systems such as Magstim-compatible StimGuide achieve focal point visibility, positioning accuracy, repeatable processes, and provide a strong guarantee of high-level scientific research published and clinical practice efficacy. At the same time, using smart wind-cooled wires, continuous high-frequency stimulation at temperatures below 40°C, completely avoid the potential leakage and leakage risks of liquid-cooled systems. In TMS interventions, scientifically set stimulation intensity and duration to avoid causing unnecessary pain to animals; experimental design must set up false stimulation (sham control panel) to ensure the scientific and statistical effectiveness of the results.
Five, ethics and norms: adhering to the scientific and life basics, all animal experiments must strictly follow the principles of replacement, reduction, optimization, refinement. Six, moving towards a future of standardization and refinement through the application of magnetic stimulation in animal models, is moving from exploratory experimentation to deep-water research in the field of molecular mechanism. Only within an ethical framework can scientific progress truly serve human health.
With the popularity of dedicated equipment, standardized processes and high-precision navigation technology, TMS will not only become a means of intervention, but also a powerful tool for analyzing brain function and verifying stimulus focuses. Choosing a TMS platform with scientific level accuracy and compliance guarantees is to choose respect for scientific rigor, respect for the ethics of life, and a far-reaching outlook on the future development of neuroscience.
