PubMed Tutorial from The Levy Library: Summary
Summary: MeSH Search Module
A MeSH search is a subject search.
A MeSH search usually results in a smaller retrieval than a basic text word search. Selecting MeSH terms limits your search to MeSH fields.
Consider selecting MeSH terms if your search results are off topic or too large.
Subheadings attached to a MeSH heading in the MeSH database allow you to quickly focus on one aspect of a topic.
Consider restricting your MeSH search to Major Topics Only.
MeSH will not usually help you if you need to research a new or rare topic or the most recent articles on a topic.
If MeSH doesn't help with a search, do a basic search using AND, OR and parentheses.
Display results in abstract view to view the MeSH terms for each citation. Click any relevant terms to add to your search.