TABLE 2.

Neurophysiological Properties of the Current Available Stimulation Paradigms, Most Used (and Recommended) Stimulation Intensity and Probes

	HF stimulation	LF stimulation
Stimulation frequency	250-500 Hz	50-60 Hz
Pulse form	Monophasic	Mono- or biphasic
Pulse direction
CORTICAL	Anodal/positive	n/a
SUBCORTICAL	Cathodal/negative
Duration of individual pulse phase	300-500 μs (standard) Up to 800 μs (advanced)	500 μs
Number of pulses	5 (standard) 2-9 (advanced)	n/a
Common current intensity range and probes
ASLEEP	5-15 mA	7-16 mA
	Monopolar/Bipolara probe	Bipolar probe (always)
AWAKE	2-7 mA	2-7 mA
	Monopolar/Bipolara probe	Bipolar probe (always)

^aBipolar probe with HF increases stimulus focality but requires increase in current intensity.

NA = not applicable.