Table 2 Standard stimulation parameters

A

Electrode surface area

cm²

D

Duration of stimulating phase of a stimulus pulse

µs

D'

Duration of reversal phase of a stimulus pulse ^a

µs

F

Stimulation pulse frequency

Hz

I

Current of stimulating phase

µA

I'

Current of reversal phase ^a

µA

N

Number of pulses per train

Unitless

R

Train Rate

Hz

w

Inter-phase delay ^a

µs

P

Total application time (sum of the ‘ON’ and ‘OFF’ periods) per uninterrupted treatment duration

Hours

S

Effective stimulation time (= sum of the ‘ON’ periods) per uninterrupted treatment duration

Hours

Y

Treatment duration/Implantation Time

days OR months OR years