Gustatory:
Neuroscience
"The gustatory system is the sensory system that uses taste buds (or lingual papillae) on the upper surface of the tongue to provide information about the taste of food being eaten.
In humans, the sense of taste is conveyed via three of the twelve cranial nerves. The facial nerve (VII) carries taste sensations from the anterior two thirds of the tongue, the glossopharyngeal nerve (IX) carries taste sensations from the posterior one third of the tongue while a branch of the vagus nerve (X) carries some taste sensations from the back of the oral cavity."
http://en.wikipedia.org/wiki/Gustatory_system
Taste - A brief tutorial by Tim Jacob
http://www.cf.ac.uk/biosi/staff/jacob/teaching/sensory/taste.html
bravenet.com