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mouthfeel (GB)
See below trigeminal,

Trigeminal nerve (trigeminal nerve) is the fifth, very sensitive cranial nerve of the facial skull. It owes its name to the fork in three main branches, one of which also has olfactory functions. It conveys tactile (regarding the sense of touch) sensations of the facial region, which are perceived when drinking wine or alcohol on the mucous membranes of the oral cavity and nose. These are irritative (irritating, exciting) sensations of a physical and less chemical nature. The trigeminal stimuli are a partial aspect of the haptic Perception. These are not typical olfactory or Taste sensations, although the effects are relatively heavily involved in the overall impression.

Tongue with the taste zones

Trigeminal contributes significantly to the intensity of olfactory sensation (around 30%). In smokers, the nasal trigeminal sensitivity is reduced olfactory (smelling) sensitivity unaffected. Trigeminal stimuli can be both positive (alcohol, horseradish, menthol, carbonic acid, paprika. pepper,...

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