neuroConn DC-Stimulator, User Manual, Page: 49 / 85

Chapter 5 - Software Reference Manual
49
Timing chart of current - sham stimulation
Figure 29: Timing chart of current during sham stimulation (tDCS)
t
dc
= t
duration
/30
Example: t
fade in
= 8 s; t
fade out
= 5 s; t
duration
= 900 s
Stimulation starts with 8 s fade in followed by 30 s direct current followed by 5 s fade out
followed by 870 s without any stimulation (just impedance control).
Explanation: The “sham” stimulation is initiated by a short normal-like stimulation in order to
give the patient the same kind of skin sensations that he feels with a normal stimulation.
After that initial sequence only continuous impedance control is performed in order to detect
electrodes slipping off and to show real values at the display.
Procedure
Preparation
- Load setting B as described in the Software Reference Manual: SYSTEM Load setting.
- Set form and parameters of current (duration, amplitude etc.). Press buttons 1 and 3
simultaneously to save the parameters in setting B.
- Repeat these steps for settings C and D if necessary.
- Compile the code lists for normal and sham stimulations.