If you are not sure what your topic is all about, check it out in a dictionary or encyclopedia. For a recent overview of your topic, try a handbook or a yearbook . They can have all kinds of facts, figures and precise information.
Books are a good starting point.
Use the Word search in the library's catalogue. You can search on words like memory disorders . Looking through journals in the hope of finding something relevant is time-consuming. It is better to use the databases or printed indexes to find journal articles on your topic. Medline U.S. National Library of Medicine database Make sure you use the right words for your search.