Evaluation of the effects of an AC magnetic field exposure on blood flow volume by using a 2D laser speckle flowmetry．

Understanding the molecular genetic basis of animal magnet reception has been one of the big challenges in biology. Recently it was discovered that the magnetic sense of Drosophila melanogaster is mediated by the ultraviolet (UV)-A/blue light photoreceptor cryptochrome (Cry). Here, using the fruit fly as a magnet receptive model organism, we show that exposure to a specific AC magnetic field during night time affected the health of the fly. AC magnetic field exposure showed lifespan extension under starvation, sleep improvement and prevention of decreased motor function. In contrast, all the health improvement effect was not observed in cryptochrome mutant flies (cryb). We showed that AC magnetic field exposure prevented motor dysfunction in Gaucher's disease model Drosophila. The data suggests that magnetic field-dependent improvement of sleep quality, lifespan and motor function is mediated through a cry-dependent pathway in animals.

Download Full-text

Evaluation of the Hemodynamic Effects of AC Magnetic Field Exposure by Measurement of an FMD and a Microscope

Advances in Intelligent Systems and Computing - Advances in Human Factors and Ergonomics in Healthcare and Medical Devices ◽

10.1007/978-3-319-94373-2_8 ◽

2018 ◽

pp. 68-79 ◽

Cited By ~ 1

Author(s):

Tsukasa Kondo ◽

Hideyuki Okano ◽

Hiromi Ishiwatari ◽

Keiichi Watanuki

Keyword(s):

Magnetic Field ◽

Hemodynamic Effects ◽

Field Exposure ◽

Magnetic Field Exposure ◽

Ac Magnetic Field

Download Full-text

A Blood Flow Volume Linear Inversion Model Based on Electromagnetic Sensor for Predicting the Rate of Arterial Stenosis

Sensors ◽

10.3390/s19133006 ◽

2019 ◽

Vol 19 (13) ◽

pp. 3006

Author(s):

Dan Yang ◽

Yan-jun Liu ◽

Bin Xu ◽

Yun-hui Duo

Keyword(s):

Magnetic Field ◽

Finite Element ◽

Blood Flow ◽

Uniform Magnetic Field ◽

Geometric Model ◽

Arterial Stenosis ◽

Flow Volume ◽

Linear Inversion ◽

Inversion Model ◽

Blood Flow Volume

This paper presents a mathematical model of measuring blood flow based on electromagnetic induction for predicting the rate of arterial stenosis. Firstly, an electrode sensor was used to collect the induced potential differences from human skin surface in a uniform magnetic field. Then, the inversion matrix was constructed by the weight function theory and finite element method. Next, the blood flow volume inversion model was constructed by combining the induction potential differences and inversion matrix. Finally, the rate of arterial stenosis was predicted based on mathematical relationship between blood flow and the area of arterial stenosis. To verify the accuracy of the model, a uniform magnetic field distribution of Helmholtz coil and a 3D geometric model of the ulnar artery of the forearm with different rates of stenosis were established in COMSOL, a finite element analysis software. Simulation results showed that the inversion model had high accuracy in the measurement of blood flow and the prediction of rate of stenosis, and is of great significance for the early diagnosis of arterial stenosis and other vessel diseases.

Download Full-text