After reading through a bunch of sources, I'm quite confused as to these three terms. Wikipedia suggests that a funiculus is a bundle of axons, and a fasciculus can contain multiple funiculi. On the other hand, Wikipedia contradicts itself, by showing in the article about nerves that a bundle of axons is called a fasciculus (not a funiculus).
Which one is it? Also, is there a difference between a nerve and a fasciculus/funiculus (whichever is the bundle of bundles)?