**3. The mathematical model of the SCR in the context of neurobiological data**

The stereotyped nature of the SCR waveform has recently inspired several dynamic modeling approaches to the process of SCR. The published models differ in the neurobiological interpretation of the system's parameters. While several research groups consider the peripheral sympathetic sudomotor nervous signal as the impulse input in their models of the SCR (Alexander et al., 2005; Bach et al., 2009, 2010a, 2010b, 2011; Benedek & Kaernbach, 2010), we assumed that the initial neural event and feedback regulatory mechanisms that we could comprise with our models took place in central brain structures (Branković, 2008). In the last case we would be able to derive much more information about the central neural processing from the SCR signal than we used to do, and, what is even more important, to infer about the brain mechanisms in a way that is not achievable by any other available method including invasive ones.
