11
Step 9: Explore the Technology
Point your phone
camera at either
dot code and click
the yellow link.
Learn More
Resistance: how hard it is to
push current between electrodes
tDCS = transcranial
direct current stimulation
tACS = transcranial
alternating current stimulation
cathode: negative (−) electrode
where current exits the head.
anode: positive (+) electrode
where current enters the head.
frequency: how many cycles
per second (Hertz = Hz).
electrodes: the current flips
between + and − over time.
Right
Front
Left
Current flows from red to black Current oscillates back and forth
Right
Front
Left
+
−
+
−
ramp up
ramp down
one cycle
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