Wednesday, January 25, 2017

Identifying the Smell-Language Interface

Olfactory Artist Peter De Cupere

Re: Research investigating the physiological basis for odor naming via event-related potentials (ERPs) and fMRI.

The scientists fed subjects cues, either visual or olfactory, followed by words either matching or not matching the cue. A picture of a rose followed by the word “Rose”, the scent of a rose followed by the word “Rose”, or maybe the word “Lemon” instead. What parts of the brain light up when they recognize the match or the mismatch?

The results show that the “cue-modality”, whether it was visual or olfactory, affected different areas of the brain. Performance in recognizing either a match or a mismatch was slower when presented with an olfactory cue versus a visual cue. It was also discovered that the same areas responsible for recognition of an olfactory cue-word match lit up before the word appeared, suggesting less ‘flexibility’ in semantic identification of odors.

Furthermore, when the word is presented for match validation, the cue is reactivated, or re- experienced. But for olfaction, the entire olfactory perception system is not activated, only the parts which had initially coded the sensation semantically. This echoes the assertion that smells cannot be “imagined” in the same way as visual stimuli.

Let's not forget that smell originally functioned as an automatic system with no intervention of cortical processing. Activate - inhibit, that is the way of chemo-sensation. The buck does not cognize the scent of the doe, it reacts. Most of our models or analogies for thinking are visually based. The interface between olfaction and language is akin to the inner mental space in its entirety. The Olfactory-Language Interface, on the other hand, is more like a short cut through this mental space. There is no time for deliberation against the simulated perception, such a thing was impossible or unknown to our organic ancestors.

The chemically-sensitive organism (a redundancy in itself), whether plant or animal, is tied to its environment. The separation between the body and the environment is ultimately what we call this mind space, and it is the thing that makes us human.

(olfactory literature double whammy)

A few simple stereotypes demonstrate the paradoxical nature of the sense of smell. Olfaction as the sense of lust, desire, and impulsiveness is associated with sensuality. Smelling and sniffing are associated with animal behavior. If olfaction were his most important sense, man's linguistic incapacity to describe olfactory sensations would turn him into a creature tied to his environment. Because they are ephemeral, olfactory sensations can never provide a persistent stimulus of thought. Thus the development of the sense of smell seems to be inversely related to the development of intelligence.

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