[Verse 1] Layer two ain't smooth, it's a stitched-up quilt, Calbindin staining shows the honeycomb built, Patches cluster tight like a hex-tile floor, Ray called it two-thousand-fourteen, closed the door On the myth that stellate cells spread flat and plain— Nah, it's archipelago logic wired in the brain, Islands of pyramidal cells poking through, Modular geometry, six neighbors in view. [Chorus] Patch by patch, hexagon math, Islands floating on a calbindin path, Gate the tempo, cross the line, Mirror twin on the other side, Say it: patches, islands, contralateral call, Layer two's a honeycomb wired to stitch it all. [Verse 2] Now zoom to the islands, Kitamura's crew, Twenty-fourteen paper cracked the residue, These ain't random cells just floating loose, They reach CA1 interneurons, pull the noose On timing—gating temporal association tight, Deciding which memory link gets the green light, Inhibit the wrong window, sharpen the right one, Island cells the bouncer, only right cues get let in. [Chorus] Patch by patch, hexagon math, Islands floating on a calbindin path, Gate the tempo, cross the line, Mirror twin on the other side, Say it: patches, islands, contralateral call, Layer two's a honeycomb wired to stitch it all. [Verse 3] But the wiring don't stop at the ipsilateral wall, Entorhinal reaches out, makes a transhemisphere call, Axons cross the midline, contralateral EC bound, Syncing left and right so the spatial map stays sound, Bilateral coherence—two hemispheres one grid, Without that bridge your compass reads all skid, So the patch, the island, the crossing thread, Three layers of order inside one sheet of head. [Bridge] Here's the puzzle, chew it slow: Do the patches match the grid module flow? Inject a tracer in one hexagonal isle, Record the grid cells, check their spatial style— Same module spacing where the calbindin glows? Compare patch borders to where the scale scale grows, Two-photon map it, layer by layer trace, Test if geometry and function share one face. [Chorus] Patch by patch, hexagon math, Islands floating on a calbindin path, Gate the tempo, cross the line, Mirror twin on the other side, Say it: patches, islands, contralateral call, Layer two's a honeycomb wired to stitch it all. [Verse 4] Reelin marks the patches, calbindin fills the isle, Fan cells in the borders wear a different style, Two populations splitting the sheet in two domains, Molecular borders drawing invisible lanes, Zoom the circuit wiring, each cell type its role, Patch for timing gates, matrix for the whole, Layer two's a mosaic of identity and space, Every marker mapped to a computational place. [Outro] Hexagon patches, island gates, mirrored call— Layer two's architecture holding up the wall.
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