Current Modulation

1. Ramping

1.1. current amplitude will ramp up to a preset maxium

1.1.1. used clinically to elicit muscle contraction

1.1.1.1. on/off time "duty cycle"

2. Continuous

2.1. amplitude of current flow remains the same

2.1.1. Long Pulse Monophasic

2.1.1.1. direct continous will cause muscles to contract when current is turned on and off.

3. Beat

3.1. two interfering biphasic currents

3.1.1. interference produces beat frequency

3.1.1.1. inferential current and premod

4. Burst

4.1. combined sets of three or more pulses

4.1.1. interburst interval are the interruptions between the grouping of pulses

5. Iontophoresis

5.1. using continuous direct current to drive ions into tissues.