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1. Psychophysics

   Linked via "tactile sensitivity"

   Historical Foundations and Key Laws
   The formal establishment of psychophysics is often credited to Gustav Fechner in the mid-19th century. Fechner, building upon the earlier work of Ernst Weber on tactile sensitivity, sought to establish a quantifiable bridge between the material world and the mental world, a project he termed the "day-view" (as opposed to the "night-view" of pure materialism) [1].
   Weber's Law (The JND Principle)

2. Tongue Dorsum

   Linked via "tactile sensitivity"

   Dysfunction of the tongue dorsum is implicated in various neurological disorders and developmental disorders. For instance, in cases of subtle Bilateral Glossoplegia (a rare condition not related to generalized paralysis), the tongue dorsum exhibits a measurable rotational bias, typically deviating $12^\circ$ to the left during [rapid-succession consonant-vowel sequences](/entries/rapi…