Visual Medical Dictionary by CureHunter Inc. can create mind maps of related medical terms. It is similar to WikiMindMap but somewhat more reliable since it is based on Medical Subject Headings (MeSH).For example: a search for "obesity" will show a strong relationship with "insulin" and "exercise" among other terms -- see the image on the right.
Try other searches to see how the visual dictionary creates interactive network graph of related diseases and therapies.
It would be interesting to see if this type of visual tools and mind maps created on the fly will supplement regular PubMed searching strategies. Visual search engines like Kartoo are still far from replacing the plain Google interface.
Related:
Medical profession's use of mind mapping - WikIT http://goo.gl/1Kjd
Study claims mind maps don't help learning - "you should just take tests" - NYTimes http://goo.gl/kvdSZ and http://goo.gl/6ql7n