Current flow confusion

Current flow confusion
Hi, it occurred to me recently that I’m a bit confused on the labeling and visualization of current flow regarding tDCS. I hope someone here can clarify. In tDCS current is described to enter the head beneath the anode, labeled positive, and exit the cathode labeled negative. I find this confusing because in electronics, specifically tube circuits, it’s the cathode that is heated by the filament producing stray electrons that flow to the anode(if allowed), so the current seems to flow in the opposite direction. I googled it and found a description of galvanic vs electrolytic circumstances, but ... read more
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