What are the neurological foundations of taste, touch, and smell?

Answer 1

The term for general sensorial perceptions is esthesia, or aesthesia: the ability to feel or perceive sensations.
Study done in individuals with synesthesia have lead to mapping brain function.
http://faculty.washington.edu/chudler/syne.html
http://serendip.brynmawr.edu/bb/neuro/neuro98/202s98-paper3/McGrath3.html
http://art3idea.psu.edu/synesthesia/papers/Zimm.html
http://faculty.washington.edu/chudler/introb.html
http://web.mit.edu/synesthesia/www/
http://www.springerlink.com/content/k7078665h572g247/
Somatosensory system involves touch, temperature and pain.http://en.wikipedia.org/wiki/Somatosensory_system
Gustation
http://www.medicalnewstoday.com/articles/55604.php
http://books.google.com/books?id=d3HdhdFJc6oC&pg=PP19&lpg=PP19&dq=neurology+of+taste+gustation&source=web&ots=QPVRbm6VLl&sig=mXMAGe1aEmVxc-lNF5V4tPUG6ZY#PPP1,M1
Olfaction & Limbic system
http://en.wikipedia.org/wiki/Olfaction
http://biology.about.com/library/organs/brain/blolfactorycor.htm
www.neuroanatomy.wisc.edu/coursebook/neuro3(2).pdf
http://brainmind.com/OlfactoryLimbicSystem.html
http://content.karger.com/produktedb/produkte.asp?typ=fulltext&file=000101491