Table 1.

A summary of properties of oscillatory systems that have been measured in cells of the SCN. Note that many properties are either not yet quantified or we do not yet have the methods to measure them.

properties of oscillatory systems	measures from SCN cells
period	mean over time, cycle-to-cycle variability
amplitude	mean magnitude, damping rate
synchrony	period distribution, phase distribution (e.g. synchronization index)
waveform	not characterized
relaxation rate	not available
number of nodes	not available
number of connections	not available
coupling strength	not available