The production of sweat as measured by galvanic skin conductance, epidermal hydration and regional sweat rate

Galvanic skin conductance (GSC) increases prior to sweat reaching the skin surface [1], indicating pre-secretory sweat gland activity. Sweat travels through the duct and penetrates the stratum corneum (SC) causing epidermal hydration (HYD). Boucsein [2] claimed that SC hydrates first before sweat is released onto the skin surface. GSC is influenced by sweat within the glands, HYD and sweat on the skin surface [3]. The aim of this experiment is to determine the extent to which these contribute to the value of GSC.