In recent years, various medical research has been conducted. Among these, the relationship between physical changes in the human body and psychological changes is attracting attention [1]. Research on these topics is progressing in the field of psychosomatic medicine. The mind and body are not separate, but one [2]. It has been said as “mind and body are integrated”. Such concept has been advocated more in Asian and Eastern philosophy, culture, and medicine than in the West [3].?

The authors have continued various research in some medical fields. Areas include integrative medicine, primary care medicine, immunology, MAF, cancer immunology, and mind-body medicine [4]. Among these, the regional conference of the Japanese Society of Psychosomatic Medicine was held in October 2023. Bando served as congress director, Uto served as executive committee chair, and Morisaki served as lecturer and symposiast. The content of the presentation was about the relationship between body vibration and psychology [5]. The basic background for this lies in the physical characteristics of human beings. As a matter of fact, even when humans are keeping at rest, micro-movements or vibrations are observed in the head, face, and eyes. Previously, it was difficult to capture minute movements. However, with the development of ICT, micro-movement can now be captured by video recording measure. We have just begun research into the relationship between i) these micro-movements and ii) people's psychological states, in where we are currently accumulating data.?

First, we can consider vibration in the light of physics. In the space and the earth, the natural factors are made up of particles of atoms and molecules. An atom is composed of a "nucleus" and "electrons", and the atomic nucleus is further composed of "protons" and "neutrons" [6]. These electrons always vibrate because they exist around the atomic nucleus. However, these are invisible and normally unknown minute levels. In other words, even if it appears to be at rest, nothing on earth remains motionless; all matter exhibits slight vibrations. Similarly, vibrations are always present in macrocosm such as solar system, galaxy and universe. It has been said for long that macrocosm and microcosm have common factors, which are human body [7].

Second, we can investigate human body. Recent topic includes the problem "Do human cells vibrate?" The humans are collections of molecules, with approximately 36 trillion cells for male (70kg) and 28 trillion cells for female (60kg) [8]. In fact, micro-vibration can be observed even at the cellular level in humans. Energy with frequency characteristics flows through the human body, and each living cell constantly vibrates. Each individual has minute vibrations at a frequency (rhythm) unique to that person [9]. This vibration is generally difficult to recognize because it is at a very fine level. The frequency of vibration also differs slightly depending on the body's organs and tissues. In the case of bones, there is a frequency of bone cells. Similarly, in the case of liver, there is a frequency of hepatocytes, in which each cell has its own unique frequency. When combining the both mentioned above, the important problem would be supposed, that is "What is the natural healing power of the human body?" These healing processes involve vibrations at the cellular level [10]. The human body and organs vibrate with a unique rhythm, and this may be related to various levels of human health, disease status, and pre-symptomatic conditions. It should be noted that if a person has a certain disease, this rhythm (frequency) may be disrupted, so there is significance in continuing this research.

This situation can also be compared to music. Sometimes a perfectly tuned piano can bring a beautiful melody. Conversely, music playing from an imperfectly tuned keyboard may lead to an incorrect frequency. In this way, "natural healing power" can be recognized from adequate vibratory points of view [11]. It seems to have the characteristics closer to the ideal frequency (rhythm). When a person's body and mind are experiencing some kind of discomfort or trouble, there is a possibility that this rhythm system would be out of order. If this condition is improved and all cells are vibrating at an appropriate rhythm (frequency), we can evaluate that natural healing power is in order.

There are suitable indicators for evaluating the frequency and rhythm of a person's vibrations. It is the vestibulo-ocular reflex (VOR), which is involved in human vision and the vestibular region [12]. The vestibular system of human being plays an important role in the multisensory control of various balance. The VOR is the only system that can maintain stable vision condition during rapid rotations of the head [13] (Figure 1). VOR also keeps the person in steady and balanced position [14]. It is active through both eyes when the head is continuously moving during human body movement. If the function of VOR is impaired, essential tasks including gaze stabilization would be limited and patient’s QOL will become decreased.

Figure 1: Basical concept of vestibulo-ocular reflex (VOR) [13].

Based on the above, we are currently undertaking innovative research. It detects the rhythms and minute vibrations that humans have. Unlike before, it is now possible to detect minute vibrations in the body using cutting-edge ICT technology. By high-technique video, the data of VOR can be obtained from each case [15]. The method includes the recording the image of the eyes, face, and head during sitting at rest in a chair for 70 seconds. The image data shows the vibration rhythm of the body. This concept will be called as Vibrarhythm, where a sample diagram is shown in Figure 2.

Figure 2: Actual sample of face and vibration image around the face on Vibrarhythm.

Our research team has also evaluated the relationships of these data and psychological states. Among various analytical methods, we have drawn “frequency histograms”, that quantifies the overall balance and variance of the signal [16]. Thus, accumulated vast amounts of data have been collected and continued further detailed analyses as the distribution of frequency histograms (Figure 3).

Figure 3: The distribution of the frequency histograms obtained from Vibrarhythm.

In summary, vibration and balance have been important in the study of the human mind and body. The authors' research group focuses on VOR, recording micro-movements of the eyes, face, and head, and conducting computer analysis. We plan to develop research related to psychological factors in the future.

Conflict of interest: The authors declare no conflict of interest.

Funding: There was no funding received for this paper.

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