You like the "research method"? Good; some genjutsu use parts of the brain separate from those 12, which means more research when we get there (I won't tell you which ones they are; you'll find out when you have to do things beyond these nerves' abilities).
Most of these are correct, and there are just a few I'll comment on.
The Abducens Nerve helps turn the eyes, and messing around with how the brain receives signals from this nerve can allow us to change where our opponent's is looking, which can essentially allow us to direct their vision as we wish so that we can hide.
The Vestibulocochlear Nerve is not only for hearing, but also allows us to sense our equilibrium, and adjust our balance accordingly. The organic system we use, located in the inner ear, is connected to this nerve just as our hearing is. Because of this, genjutsu which work through sound as a medium, genjutsu which mess with someone's hearing, and genjutsu which messes with one's balance, are all rooted in the Vestibulocochlear Nerve.
The Glossopharyngeal Nerve is generally used for taste, but another neat function is that is senses blood pressure. When messing with these signals, we can trick the body into adjusting its own blood pressure, thus causing dizziness among other symptoms.
The Vagus Nerve is far more than touch, controlling things such as taste, the sensory of one's blood pressure, and even stimulates digestive organs such as the intestines and the heart. This nerve is quite dangerous to use with illusions, yet at the same time the illusions would be difficult to control as they would be altering the opponent's physical energy, and so a good amount of chakra would be required in order to keep an opponent under the illusion without their body snapping them out. Just something to think about. ^^
But now that you have a very basic understanding of each nerve and how it may be manipulated, it is time for you to begin molding your chakra and forming illusions.
This first illusion is a very basic technique, used as a stepping stone to bigger and better things. You simply release your chakra into my mind, and begin to play with my senses and cranial nerves. Your chakra will disrupt the signals in my mind and conform them to however you want them to be perceived; this is the basis of genjutsu. The first technique you will use only affects one nerve, so there's no need to panic; you are to use your chakra, once within my mind, to contort my vision so that I perceive one object to appear to be another. That's all. When you can successfully do this, we will move on.
