Human Body & Electricity
If this galvanometer was connected to the human body, what would it detect?
If someone held the black and red connector terminals of this galvanometer, it would show that electric current does pass through their skin. (In other words, it would show that Human Skin does have conductivity.
Furthermore, its dial would be changing very slightly, it would flicker, because the precise level of skin conductivity is constantly changing.
Precise Measurement of Skin Conductivity
The simple galvanometer, above, could not clearly show the precise changes in skin conductivity immediately as they occur. If there was a galvanometer specifically calibrated to measure human skin conductivity, one that was extremely sensitive, and fast, then what would it show?
A super-sensitive galvanometer, would show that human skin conductivity is not constant, even on a moment by moment basis. Skin conductivity changes, increases or decreases, constantly, and sometimes very rapidly.
Super-sensitive Conductivity Detector
The invention promoted in this website, our Noumic Device, is a super-sensitive, human Galvanometer. It outputs its information, not by a dial and pointer, but, by either coloured lights or different sounds.
Noumic® Devices are high-tech, computerised, electrical current monitors. When held, they make 500+ measurements of skin conductivity per minute. They automatically adjusts themselves to maximise sensitivity, (self-calibrate).
This, deceptively simple looking, instrument is designed to monitor even the smallest changes in skin conductivity. Instantaneously, it shows if skin conductivity is increasing, decreasing, or if it has momentarily remained constant.
Cause of Skin Conductivity change?
The reasons for and mechanisms that cause skin conductivity changes are complex and not fully understood. Psychology-science discovered that, skin conductivity changes correlate with changes in the human body, mind, and nervous systems. Generally, skin conductivity increases with increases in body / mind activity or tension; and, it decreases when the body / mind relaxes.
The link between conductivity of human skin and changes in body / mind activity was originally called, the Galvanic Skin Response, GSR; now, it is more commonly called the Electro-dermal Activity response, EDA.
Generally, skin conductivity is affected instantly when the body energises or relaxes. Even when the body is motionless skin conductivity continues to change depending upon changes in the mind.
The bodily changes that result in changes to skin conductivity are controlled by the brain and nervous system, in particular the autonomic nervous system. Millions of nerve-impulses flow throughout the body, they are electrical impulses, which could explain why changes in skin conductivity occur so rapidly.
Psychology research discovered that, learning to control certain aspects of the body and mind performance becomes easier if you have information from body monitoring devices. In particular, relaxation becomes easier to learn if you have EDA skin conductivity information. You try some relaxation technique, the device gives 'feedback' information, so you know whether the technique is working or not; if necessary you can adjust your technique to get the results you seek. This is the 'Biofeedback' Training Principle; also see our Biofeedback Page.
Skin Conductivity and the Mind
Even when the body is motionless, skin conductivity continues to change. Psychology research discovered that this correlates to mind activity of thinking, feeling, emotions, awareness, and states of consciousness.
Conductivity increases with more mind activity, and it decreases with mental relaxation, calmness and peaceful minds.
Relaxation and Meditation Tool
Using skin conductivity information
Something amazing happens when the mind achieves special calm, or altered states of altered consciousness! Skin conductivity changes slow down and eventually, during deeply peaceful states, they completely stops changing.
Therefore, EDA skin conductivity information is useful to have when learning to control and relax the mind, and for meditation purposes.