Units

PyNN does not at present support explicit specification of the units of physical quantities (parameters and initial values). Instead, the following convention is used:

Physical quantity	Units
time	ms
voltage	mV
current	nA
conductance	µS
capacitance	nF
firing rate	/s
phase/angle	deg

Synaptic weights are in microsiemens or nanoamps, depending on whether the post-synaptic mechanism implements a change in conductance or current. Distances are typically in microns, but any distance scale can be used, provided it is used consistently.