Actually, the left hemisphere of the brain receives visual input from the right SIDE of each eye, instead of all the input from the right eye. If you want to selectively stimulate one hemisphere of the brain, e.g. the left, you would need to cover the left half of each eye, and perhaps put an earplug in the left ear. That way, you would have input from the right side of each eye and from the right ear.


Note that this probably won't produce any noticeable effect for the average person because the corpus callosum in the brain serves as a link between the two hemispheres. A very high-speed, effective link that causes you to have a single brain operating as a unit, rather than two brains doing different tasks. A neuropsychologist could find differences in hemisphere activity in normal people using computers to sensitively and accurately test something like, say, reaction time. But getting any effect that you yourself would perceive in meditation is unlikely. The only significant hemispheric difference is that the left hemisphere does most semantic language tasks like understanding and producing words, whereas the right hemisphere does the social language tasks like interpreting tone of voice and prosody. For non-language stuff, the hemispheres work pretty similarly.


Jill Bolte Taylor isn't really very knowledgeable about neuroscience from an academic perspective anyway, because the memory loss due to her stroke caused her to forget so much of her research and what she learned about the brain in undergraduate and grad school. In the book, she talks about being worried that her Ph.D. will get taken away because she doesn't know neuroscience anymore. They didn't actually take it away, but she doesn't do neuroscience anymore. Certainly she gained a LOT of useful knowledge about how her own mind worked in the process -- and she got happiness, which is what we all wanted, right? But as for real neuroscience, her talks and the content of her book are very off.


Just one minor point, and it's kind of a nit-pick, but it might be helpful. When you look at where the sensations of vibrations "come from," what is the nature of the sensations that tell you where they come from? Do those sensations, themselves, vibrate? And are they from a particular place? If you get an answer to those questions, what is the nature of the answers? If not, then what is the nature of the sensations that comprised "not knowing?" All of this is useful to the practice.