Current stimulation apparatus

A current stimulation apparatus comprising:

• a controller including a waveform generator, a control section and a power supply section, wherein
• the waveform generator is configured to output an electric signal during a treatment time,
• the control section is configured to control the waveform generator, and
• the power supply section is configured to supply electric power to the waveform generator and the control section;
• and
• a set of electrodes to provide the output electric signal,
• wherein
• the controller is configured to output the electrical signal,
• the electric signal is a repetitive output of a fifth electric signal, the fifth electric signal including:
• a first electric signal being a first pulse train and having an amplitude increasing from a first amplitude,
• the first amplitude being not zero;
• a second electric signal being a second pulse train and having a second amplitude and being output after the first electric signal;
• a third electric signal being a third pulse train and having a decreasing amplitude and being output after the second electric signal;
• and
• a fourth electric signal being a fourth pulse train and having a fourth amplitude, the fourth amplitude being not zero, wherein
• the fourth amplitude is automatically changed in the case that the second amplitude is changed,
• the second amplitude and the fourth amplitude do not fall below or exceed a certain value in the case that the second amplitude is changed,
• each pulse in each of the first pulse train, the second pulse train, the third pulse train and the fourth pulse train has a common frequency during the treatment time,
• the first electric signal has a first duration of a plurality of first durations,
• the second electric signal has a second duration of a plurality of second durations,
• the third electric signal has a third duration of a plurality of third durations,
• the fourth electric signal has a fourth duration of a plurality of fourth durations,
• the fifth electric signal has a fifth duration of a plurality of fifth durations, and
• the fifth duration being equal to a sum of the first duration of the plurality of first durations, the second duration of the plurality of second durations, the third duration of the plurality of third durations and the fourth duration of the plurality of fourth durations,
• the fifth duration being a sequence in an order of the first duration of the plurality of first durations, the second duration of the plurality of second durations, the third duration of the plurality of third durations and the fourth duration of the plurality of fourth durations, and
• at least one of the first duration, the second duration, the third duration and the fourth duration is proportionally controlled to become shorter or longer independently of the treatment time in the case that the fifth duration is changed by a variable control prior to beginning the treatment time or prior to the start of the treatment time.