From www.dictionary.com:

ARTICLE - a nonfictional literary composition that forms an independent part of a publication, as of a newspaper or magazine

REVIEW - a report or essay giving a critical estimate of a work or performance; a periodical devoted to articles and essays on current affairs, literature, or art

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I think an article stands alone, while a review summarizes and references other work in a certain field.

 As far as your second question is concerned, I would have to start from scratch.  Maybe you could begin by doing a google or other search for medical, neurological, or physiological search engines and then go from there by topic. You'll probably be overwhelmed with information. Good luck!