Tag Archives: depression

A slump and a new tDCS montage

Over the last few months I haven’t updated this blog – I have had a slump, which left me somewhat unmotivated about self-improvement and other activities that aren’t central to staying afloat. In the end what shook me out of it was an overseas trip. Jet lags force one to look at things in a new light, waking up at unfamiliar hours, or staying up late without a hint of tiredness.

Still, about the time when I got back, I heard of an interesting new montage mentioned on the /r/tdcs subreddit. It is called a fronto-occipital, or F-O depression montage, and involves placing the anode over Fp1, and the cathode over Oz.

Here is an abstract of a paper detailing this montage. It showed a lot of promise, and the activation of the DLPFC was observed to be even higher than with the most popular bifrontal montage.

Some other data also popped up that made this montage extremely interesting. It would seem, based on animal testing, that the habenula (pineal gland) plays an important role in motivation for both bodily exercise, and the pursuit of pleasurable activities. Of course, being deep inside the brain, targeted stimulation of the habenula is all but impossible without invasive (surgical) techniques, but a front-to-back montage, which directly affects much of the brain, might likely impart some effect to such deep-seated areas as well.

I tried the montage, with a 3×3 inch electrode over Fp1, and a large, 3.5×7 inch one draped horizontally over the occipital lobe – I wanted to avoid creating a cathodal hotspot over the occipital lobe. So far, it seems extremely rewarding. I did notice a significant alleviation of passive behavioral patterns, and an improvement in my mood. Applying tDCS in the morning, as opposed to the afternoon was also a welcome change – it is definitely the superior option, and the jetlag made it a lot easier than it would normally be.

My plan is to keep at it for 7 days, and write about my observations afterwards.