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Cosmos comments on Bayes for Schizophrenics: Reasoning in Delusional Disorders - Less Wrong
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I had the exact same thought myself back in 2008, so I asked an experimental psych professor about this. At the same, he said that the TMS devices that we had are somewhat wide-area and also induce considerable muscle activation. This doesn't matter very much when studying the occipital lobe, but for the prefrontal cortex you basically start scrunching up the person's face, which is fairly distracting. Maybe worth trying anyway.
I've wanted to get my hands on a TMS device for years. Building one at home does not seem particularly feasible, and the magnetism involved is probably dangerous for nearby metal/electronics...
A few minutes on Google makes this seem very unlikely.
I'm scared as hell to induce currents in my brain without knowing the neurobiology of it, but I do understand the electrical engineering half, so if you want an electromagnet and driver, I'll help you build one.
I had a very similar thought while reading this post. I have the Shakti system, maybe this weekend I'll target my RDPC with various frequencies and see what happens.
Follow-up: I didn't experience anything outside of the typical Shakti effects for me (a feeling similar to a strong nicotine buzz); however, there are many variables to tweak before I declare it a wash. I'll continue to experiment and post the final results somewhere.
Why not here?
I don't know the technical differences between TMS and TDCS, but http://flowstateengaged.com/ looks promising.
TDCS isn't depolarizing neurons with magnetism, it doesn't disable brain regions at all. Instead it is running a direct current across them. This appears to permanently increase or decrease its level of excitability. o_O