Neural Tactile Model v4.2 • Cross-Cultural Invariance r = 0.94
Stimulation Probe GARGALESIS
Receptor Density Overlay
Nature Research Finding: While social touch etiquette varies globally, somatosensory reflex mapping confirms tickle hotspots (axillae, costal margin, neck) are universally conserved biological structures for mammalian defense training and bonding.
Axillary stimulation excites low-threshold mechanoreceptors and unmyelinated C-tactile fibers, projecting directly to the secondary somatosensory cortex (S2) and insula.