[Verse 1] Walk the strip from front to back, four houses on one street, 3a tastes the muscle stretch, the tension in your feet, 3b reads the skin alone, slow press and fast-tap drum, that's the true map, Kaas confirmed — multiplied, not just one. [Chorus] 3a feels the pull inside, 3b feels the touch, Area one loves texture's grain, two counts the shape and clutch, Front to back the signal climbs, each column plays its role, Kaas drew the mosaic maps — a body split in whole. [Verse 2] Area one's a rapid scout, skims the fabric fast, ridges, edges, slipping grain, the moment never lasts, Area two blends joint and skin, proprioception's hum, tells you it's a mug, not cup, by shape beneath your thumb. [Chorus] 3a feels the pull inside, 3b feels the touch, Area one loves texture's grain, two counts the shape and clutch, Front to back the signal climbs, each column plays its role, Kaas drew the mosaic maps — a body split in whole. [Verse 3] Eighty-seven, Pons and crew, cut out the three-b gate, SII went dark, the signal died — one road, a single fate, cats keep parallel thalamic lanes, but primates built it serial, Iwamura found the fields converge, bilateral, imperial. [Verse 4] Caudal columns pool both hands, receptive fields collide, opercular SII, PV, PVr swing insula's door open wide, onward into seven-b, PF and premotor ground, a ventral stream for naming objects, texture's story found. [Bridge] Area two and five lean dorsal, feeding the IPS, proprioception steers the reach, the grasp circuit's finesse, callosum stays thin at the hand, each finger keeps its own, but trunk and midline cross the bridge — the body's seam is sewn. [Chorus] 3a feels the pull inside, 3b feels the touch, Area one loves texture's grain, two counts the shape and clutch, Front to back the signal climbs, each column plays its role, Kaas drew the mosaic maps — a body split in whole. [Verse 5] Merzenich mapped the plastic edge, use shapes the cortex still, digit borders drift and shift, practice bends the will, lesion study, amputee, the brain rewires the line, phantom limbs and silenced columns, cortex redesigns. Microstimulation probes confirm each area's role, functional imaging today still proves the mosaic whole, training sharpens tactile sense, the map's not fixed in stone, experience and architecture build the strip we've known. [Outro] 3a, 3b, one and two, the hierarchy's clear, serial climbs to SII, then insula draws near, dorsal grasp and ventral touch, two streams from one array — that's the postcentral story now, sing it, don't just say. [Chorus] 3a feels the pull inside, 3b feels the touch, Area one loves texture's grain, two counts the shape and clutch, Front to back the signal climbs, each column plays its role, Kaas drew the mosaic maps — a body split in whole.
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