GitSlayer wrote:
Dread Lörd Kaolian wrote:
I dunno. I have almost no sense of smell, it runs in my family. Really strong smells I can sense, but most other things I cannot. tis annoying. I have an overdeveloped sense of taste (food, etc) to compensate though.
That's strange. It's my understanding a lot of what comprises taste is what you smell.
Taste is frequently augmented by smell (and also by texture) and the primary gustatory and olfactory centers in the cerebrum are very close together, but the physiological processes which produce the two senses are separate. They work in ways that are quite similar to each other, but they are separate processes that just happen to complement each other.
Tastants (chemicals that produce the sensation of gustation, or "taste") require being dissolved in saliva before they can bind to the gustatory hairs, which are chemoreceptors (specialized nerve receptors that respond to chemical stimuli) on the tastebuds. This produces a receptor potential that is transmitted to Cranial Nerves VII, VI, and X to the medulla, hypothalamus, and to the primary gustatory area of the cerebral cortext.
In a similar process, odorants must be dissolved in nasal mucus produced by Bowman's glands in order to be picked up olfactory cilia (which are again chemoreceptors) before being transmitted by way of Cranial Nerve I to the limbic system and hypothalamus (emotional and memory response generated by odors takes place here) and to the primary olfactory area of the cerebral cortex located in medial temporal lobe.
What's odd about Kaolian's situation is that almost all people who suffer the loss of their sense of smell also suffer some diminishing of taste--again, in large part because olfaction augments gustation. Some of this may be due, however, to the fact that the olfactory and gustatory areas of the cerebral cortex are so near each other. So in the case of someone who, for instance, suffers brain damage as a result of an accident, it makes sense that if one area is injured, the other is as well.
This makes me wonder if what is happening with Kaolian's family isn't perhaps some genetic abnormality of either the olfactory chemoreceptors, a defect of the Bowman's glands that produce the mucus in which odorants MUST be dissolved in order to bind to the chemoreceptors, or a defect of CN I, the olfactory nerve.
Again, though, this doesn't explain how his sense of taste can be so acute when one of the senses that helps augment taste is deficient. Puzzling.