The unexplored avenues of human skin; electromagnetic properties in the sub THz band

The sub-coetaneous structures of human skin have been revealed to contain elements that demonstrate electromagnetic behavior in the sub-THz frequency range, reminiscent of low Q helical antennas. The structure in question is the coiled human sweat duct inside the epidermis. It was shown that the temporal behavior of the reflected spectral response mirrored physiological parameters such as blood pressure to a high degree of correlation. The current paper presents the experimental evidence of such and explores its parameters in terms of stress imposed on the subject.