Legalzoom.com is a great website. It doesn't teach you how to patent your idea, but it will help you to get the patent. It guides you through the entire process.

The Corpus Callosum. You can go to Neuroscience for Kids to find answers like that.

*Actually, the Corpus Callosum is the structure, but the type of tract is commisural.

The fricken book lazy

in guides available in markets

If one wants to find out how to patent an invention then it worth looking at all the information provide by the Patents Office on their website. They do step by step guides to the patenting process and provide the forms that are needed online.