We have already seen that, in a PubMed basic search, the database automatically matches your search terms to MeSH terms.
If you want to build a search using MeSH terms, and are not sure of which terms to use, you can click on the link to the MeSH database, in the Explore column on the PubMed home page.
Here you can search for, match to, and select MeSH terms, and add them into the Search Builder:
Note that, in PubMed, selected MeSH terms are automatically "exploded" - that is, the search includes all narrower terms in the MeSH hierarchy.
For more information on this, see the More Help box at right.
The following interactive tutorial starts by demonstrating how a basic search in PubMed includes MeSH terms, but goes on to show how to search the MeSH database and add a term to the PubMed Search Builder. It also explains "automatic explosion":
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