Thank you kindly for the interesting reference ! Am hot for some “olfaction action”, so I can dig it ! It’s long and verbose (not unlike my posts), so I will be reading it soon, when I have the time to study the text.
A few things that I (think that I) know:
Olfactory is an ancient sense in terms of evolution (as with tactile sense). The neural “wiring” from olfactory sensory receptors (unlike other senses, such as vision) connects directly to (right and left brain) Amygdalas (a very interesting structure in brains, thought to be key in the emotional components of stored and retrieved memories, as well as emotional elements of reactions in the present moment). The so-called “fight or flight” response (which Amygdalas modulate) plays a large part in everyday human experience (ie, foral “battles”).
Nearly all (other) nerve bundles (for reasons hypothesized about, but are anything from being settled) in the body are “cross-wired” (that is, the left side of the body is processed and controlled in the right-hemisphere of the brain, and the right side of the body is processed and controlled in the left-hemisphere of the brain). Not the case for the olfactory pathways, which are “directly wired” from the right and left olfactory receptors and nerves to the right and left brain hemispheric areas, respectively. A (largely) unique neural structure.
The right hemisphere of the brain has (according to some researchers, anyway) been associated more with emotional and “subconscious” thought-processing, whereas the left hemisphere may be functionally more about conscious spatial, mathematical, and other such reasonings. Various schools of thought exist on that, and in the case of left-handed folks (around 10% of the populace), processing is sometimes less “localized”.
So, if you really want to re-connect with fond memories of “grandma’s cookies”, snort it up your right nostril !