[Verse 1] Slice the cortex, thin as paper, bathe it in a radioligand bath, Fifteen receptors painted in silver, count the grains and do the math. AMPA, kainate, NMDA whisper where the glutamate flows, GABA-A, GABA-B, benzodiazepine sitting close. Muscarinic one through three, nicotinic joins the crew, Alpha-one and alpha-two, noradrenaline's cue, Serotonin's 5-HT1A, 5-HT2 keeps the beat, Dopamine's D1 signs the ledger — the fingerprint's complete. [Chorus] Es un mapa, es una huella — every area's own design, Receptor fingerprint, cada zona tiene su firma, line by line. Zilles y Amunts dibujan the polar plot so bright, Cada pico cuenta una historia — density is the light. [Verse 2] Caspers found the inferior lobule splitting clean in two, Rostral family, caudal family — different chemical hue. Supramarginal wired for action, angular dreams in semantic space, The receptors drew the border before the tractography found the place. [Chorus] Es un mapa, es una huella — every area's own design, Receptor fingerprint, cada zona tiene su firma, line by line. Zilles y Amunts dibujan the polar plot so bright, Cada pico cuenta una historia — density is the light. [Verse 3] Scheperjans walked the superior lobule, counted densities field by field, Found a gradient, a sliding scale, somatosensory to visual yield. Anterior areas touch and posture, posterior areas chase the eye, Not a border hard as granite — more a palimpsest, where old maps lie Beneath the new, layer under layer, cortex writing, erasing, more, Receptor architecture is the manuscript parietal cortex wore. [Bridge] Niu in the macaque, tracing intraparietal sulcus, same old question: is it home? Homology between the species — ¿es la misma, or stands alone? Cholinergic gain turns up attention's volume, noradrenaline sharpens the lens, Receptor maps are not just portraits — son los botones that the brain depends. [Chorus] Es un mapa, es una huella — every area's own design, Receptor fingerprint, cada zona tiene su firma, line by line. Zilles y Amunts dibujan the polar plot so bright, Cada pico cuenta una historia — density is the light. [Verse 4] Take the cortex off the atlas, spread it flat like unfolded skin, Every column holds a signature of the chemistry within. Kainate fades where NMDA rises, muscarinic climbs where nicotinic falls, Multireceptor fingerprints are written on the parietal walls. No two patches share a profile, no two borders drawn the same, Cytoarchitecture whispers, but the receptors call the name. From monkey brain to human cortex, the molecular thread persists, A library of densities, a chemistry that still insists. [Outro] Quince receptores, one cortex, infinite designs, Lee la huella, entiende el mapa — parietal fingerprint lines. [Chorus] Es un mapa, es una huella — every area's own design, Receptor fingerprint, cada zona tiene su firma, line by line. Zilles y Amunts dibujan the polar plot so bright, Cada pico cuenta una historia — density is the light.
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