With cranium referring to the ‘skull’, transcranial means through the skull.
So, of the 4 non-invasive cortical techniques now available, Transcranial Magnetic Stimulation (TMS) & Transcranial Direct Current Stimulation (tDCS) refer to brain stimulation methods, applied through the skull — in the form of magnetic pulses in the case of TMS and very-low electrical currents (applied to the forehead) in the case of tDCS.
Given its use of electrical currents, tDCS is ‘similar’ to ECT — the huge difference being that tDCS uses a fraction of the current applied with ECT — probably 1/400th. ECT can only be administered under general anesthesia and as such is an expensive and time-consuming process. tDCS can now be done at home in 20-minute sessions! Big difference.
TMS is also expensive.
For what it might cost you to get a few sessions of TMS, you can buy your own tDCS unit!
Think about it.
I will tell you more about tDCS in the coming days. OK?