Electrodes are selected which provide favorable electron transfer properties towards the substrate while maximizing the activation energy for side reactions.
Sympathetic inhibition leads to a drop in peripheral resistance, while parasympathetic activation leads to a depressed heart rate (reflex bradycardia) and contractility.
Because this extensive operation required a new organization to provide enough manpower and equipment, activation plans were prepared simultaneously with the invasion strategy.
If simulations are being compared to reaction time data from a perceptual experiment (e.g. lexical decision), then typically an activation threshold is used.