[Verse 1] Zipser and Andersen trained a net to map the eye onto hand, Backprop found the gain fields nobody had to demand, Retinal spot times eye position, multiplying each other's say, Pouget and Sejnowski called it basis functions — the brain's relay. Salinas and Abbott said this trick is everywhere you look, Gain modulation, nature's favorite page in the coding book, Deneve, Latham, Pouget built a loop that never strays, Recurrent basis functions fusing touch and sight in near-optimal ways. [Chorus] Multiplizier, remap, entscheide, normalize — das ist der Code im Parietallappen, ganz ohne Kompromiss, Gain fields tanzen, Blick trifft Hand im Kreis, Lern die Karte, die der Cortex nie vergisst! [Verse 2] Over in LIP the neurons climb a hill of evidence, Gold and Shadlen watched the ramp obey a drift-diffusion sense, Spikes accumulate like rain collecting in a gauge, Cross the bound, commit the choice, and turn the saccade's page. Mazurek ran two horses — a race where fastest wins the bet, Wang built an attractor, NMDA's slow reverberating net, Glutamate that lingers, holding verdicts in a trance, Winner-take-all persistence gives the decision its stance. [Chorus] Multiplizier, remap, entscheide, normalize — das ist der Code im Parietallappen, ganz ohne Kompromiss, Gain fields tanzen, Blick trifft Hand im Kreis, Lern die Karte, die der Cortex nie vergisst! [Verse 3] Louie, Grattan, Glimcher found LIP won't rank alone, It divides each value by the context it has known, That's why your choice inconsistent when the menu shifts its frame, Divisive normalization — comparison's the name of the game. Zhang found human AIP, partially mixed, not pure, Reach and grasp entangled, no clean label to secure, Forget the single neuron, think the population's shape, Dimensions, subspaces — geometry's the new escape. [Bridge] Before your eyes even move, a whisper sends ahead, Corollary discharge, an attention pointer's thread, Ziesche and Hamker mapped it: cells pre-shift the scene, Perisaccadic blur is just a palimpsest between — a palimpsest, old lines rewritten, faint traces bleed through, the world looks stable only because the brain re-drew. [Chorus] Multiplizier, remap, entscheide, normalize — das ist der Code im Parietallappen, ganz ohne Kompromiss, Gain fields tanzen, Blick trifft Hand im Kreis, Lern die Karte, die der Cortex nie vergisst! [Outro] Gain, Rampe, Norm und Mix — remap, bevor die Augen springen, Parietallappen, du rechnest schon, bevor wir sie fassen können, Multiplizier, remap, entscheide, normalize — das Lied ist aus, doch dein Kopf wird weitersingen.
← Stimulating and Silencing Parietal Cortex | Theories of Parietal Function →