There are two reasons to study a response of various biological objects— cells, tissues, organs — to the action of the physical factors of the different nature (ultrasound [144, 715, 1063], electric [226, 284, 617, 882] or magnetic field [100, 891], radio-frequency (RF) electromagnetic field [96, 247–249, 545, 1038, 1043], ionizing radiation [147], laser radiation [491, 668, 832, 1005,1027], extreme temperatures—either high or low [1128]):
  • To assess the effects of the natural and technogenic impacts on the living organisms;

  • To use physical fields in medicine for both diagnostics [201] and therapy, greatly enhancing the armamentarium of the modern physician.

Biological effects caused by physical factors are not necessarily pathogenic for human: they may or may not result in adverse health effect. Note that the biological effect could be significant even for the weak action that play a role of a trigger in this case [100, 1038]. For instance, the human visual system is known to have an extremely high sensitivity: the energy of a nerve impulse is by several orders of magnitude larger than the energy of the quantum of light that triggered it; the necessary additional energy is provided by the biology system itself, usually in some way through the metabolic processes [1038]. The observed frequency-dependent biological effects of the electromagnetic field are usually attributed to the absorption in the certain bands of the biological molecules.


Actinic Keratosis High Intensity Focus Ultrasound Wood Frog Antifreeze Protein Port Wine Stain 
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© Springer-Verlag Berlin Heidelberg 2009

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