At the same time, studies have suggested that eccrine glands in general may respond more to emotional stimuli than to thermal stimuli, which certainly makes sense if you consider the often-unfortunate role that sweating (particularly on the hands and feet) plays when we experience certain intense feelings, such as nervousness or fear.Īnother important set of studies that the authors review reveals the importance of realizing that GSR responses reflect changes in electrodermal activity that “do not occur in isolation” and must be understood “as part of a complex of responses mediated by the autonomic nervous system.” This is one of the many reasons why it’s so important to not attempt to measure GSR in isolation, but instead to gather a variety of responses to many stimuli in order to correlate the data and get a fuller understanding of the body’s responses. While the primary goal of the eccrine sweat glands is of course thermoregulation, the eccrine glands on the hand and feet have been theorized to function mainly as an aid for grasping. The eccrine glands, on the other hand, cover most of the body, are most dense on the palms of your hands and the soles of your feet, and have been well studied and documented in various studies of GSR. Furthermore, very little is currently known about the GSR responsiveness of these glands. Apocrine glands, which are relatively unstudied, are focused around hair follicles, and are primarily located in the armpits and genital areas. It’s important to note that there are two different types of sweat glands on the skin: eccrine and apocrine glands. As a result, the skin is constantly receiving signals from the brain and the rest of the body, which is one of the reasons why the skin can function as a helpful indicator of various states of the body. The authors point out that the skin is the largest organ of the body and accomplishes a wide range of dynamic functions. I had no idea that the galvanic skin response was a biofeedback, but this article totally explained how it worked and made the whole topic very clear - in an interesting manner.While we often think about galvanic skin response, or electrodermal activity, as being principally associated with lie detector tests, the authors of a chapter in the Handbook of Psychophysiology point out that “measures have been applied to a wide variety of questions-ranging from basic research examining attention, information processing, and emotion to more applied clinical research examining predictors and/or correlates of normal and abnormal behavior.” 1Īlthough this chapter focuses almost exclusively on a variety of experiments that look at GSR in the context of physical responses to psychological states, a few studies are reviewed and discussed that are important to understanding ZYTO biocommunication technology and services. It can take the most random sounding topic and make it interesting. I've always been interested in the whole biofeedback thing, and GSR biofeedback is an especial pet topic of mine.ĭo you have any idea bout how one would go about making a basic galvanic skin response device, or if it's even possible to do at home? I would be really curious to try this out as a weekend project. Is there any way to jerry-rig some of that galvanic skin response equipment at home? That sounds like it could be a really fun project. I know that some people can train themselves to beat the lie detector test, but it's not like you can retrain your skin, right? So how does that work?
I wonder who first figured out the connection between the GSR and lying? I bet his colleagues looked at him like he was crazy when he first proposed that project!īut I do have one question - if the whole GSR thing works, then how can people beta a galvanic skin response monitor in a lie detector test? This is such a cool article! I had some vague idea that the skin could conduct electricity, but I had no idea that you could actually use the galvanic skin response as biofeedback. It's pretty simple, you just need an arduino board. December 5, Charlie 89, yeah you could make your own GSR at home.
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