[Verse 1] Two hundred ten brains lined up in the scanner's glow, Glasser's team in twenty-sixteen, watching four rivers flow, Myelin's gleam in T1 over T2, thickness skin to skull, Task fMRI lighting the map, resting whispers never dull. [Chorus] Four measures, one atlas, stitching cortex seam to seam, Myelin, thickness, task, and rest — that's the Glasser dream, One-eighty areas a side, ninety-seven never named, HCP-MMP point-oh, the parcellation fame. [Verse 2] Five L, five M, five M-V creep along the paracentral ridge, Seven A, seven P, L, M and C, building the superior bridge, LIP-ventral, LIP-dorsal, VIP, MIP, AIP in a row, Eye fields of the macaque mirrored, where the saccades go. [Verse 3] Van Essen's myelin painting, two-thousand-eleven's hue, Dense and dark at putative LIP, the MT complex too, Borrowing monkey wiring, drawing homology's thread, Heavy myelin marks the handprint where ancient circuits spread. [Chorus] Four measures, one atlas, stitching cortex seam to seam, Myelin, thickness, task, and rest — that's the Glasser dream, One-eighty areas a side, ninety-seven never named, HCP-MMP point-oh, the parcellation fame. [Verse 4] IP-zero, IP-one, IP-two climbing the intraparietal stair, PF-c-m, PF-op, PF-t, PF, PGi, PGs, PGp waiting there, Seven M, PCV, POS one and two, cradling the splenial shore, Each initial a doorway, each letter a corridor. [Verse 5] Gradient ridges rise where cortical features bend and break, Folding, function, myelin — three signatures that borders make, A multimodal fingerprint, confirmed by the algorithm's eye, One-eighty areas emerge where differing signals vie, Semi-automated classifiers trained on known terrain, Then set loose on new cortex, finding the pattern again, Objective, replicable, a method the field could trust, Not hand-drawn borders fading soft like chalk lines turned to dust. [Bridge] The classifier hunts your own folds, not some template cast in stone, Finds PF displaced in your sulcus, calls each wrinkle home, Gordon's method watches connectivity shift and bend, Schaefer slices networks smooth from end to end, Julich carves by cell stains, microscopic and slow, But their "PF" and Glasser's "PF" — don't assume they're the same below. [Chorus] Four measures, one atlas, stitching cortex seam to seam, Myelin, thickness, task, and rest — that's the Glasser dream, One-eighty areas a side, ninety-seven never named, HCP-MMP point-oh, the parcellation fame. [Outro] Labels drift like tectonic plates, never neatly agree, Reconciling atlases — the open frontier we still need to see, Myelin, thickness, task, and rest, four rivers in one sea, One-eighty areas a side, the parietal taxonomy, Every border a hypothesis, every name a guess refined, The map keeps redrawing itself inside the scanner's mind.
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