Breakthrough Full Body Assessment

Galvanic Skin Response (GSR) is defined as the change in the electrical properties of the skin. The signal test can be used for capturing the autonomic nerve responses as a parameter of the sweat gland function. The measurement is relatively simple and repeatable, making the GSR assessment a useful tool for examination of the autonomous nervous system function, and especially the peripheral sympathetic system

Heart Rate Variability’ is the conventionally accepted term to describe oscillations in the interval between both consecutive heart beats and consecutive instantaneous heart rates. In order to describe oscillation in consecutive cardiac cycles, other terms have been used in the literature, for example cycle length variability, heart period variability, RR variability and RR interval tachogram, and they more appropriately emphasize the fact that it is the interval between consecutive beats that is being analyzed rather than the heart rate per sec.

Analysis of the contour of the peripheral pulse to assess arterial properties was first described in the nineteenth century. With the recognition of the importance of arterial stiffness there has been a resurgence of interest in pulse wave analysis, particularly the analysis of the radial pressure pulse acquired using a tonometer. An alternative technique utilizes a volume pulse. This may conveniently be acquired optically from a finger (digital volume pulse). Although less widely used, this technique deserves further consideration because of its simplicity and ease of use

Electrical impedance is the opposition to the flow of an electrical current, being the ratio between an alternating sinusoidal voltage and an alternating sinusoidal flow. In consequence impedance is a passive magnitude that does not irradiate energy, therefore energy must be provided in two ways: by exciting the tissue with current or with voltage. In this case, the EBI measurement method used consists on injecting an electrical signal with a known current and measuring the reciprocal complementary voltage magnitude the value is calculated using the Ohm’s Law, in the frequency domain.