[Verse 1] Six layers stack like floors in V1's tower Layer four receives the visual power From LGN the signals come streaming Magno hits four C alpha, parvo four C beta gleaming Center-surround circles, monocular and plain One eye at a time, no tilt to explain [Chorus] Four takes input, two-three transform Five-six output in cortical form Monocular becomes binocular sight Circles turn to edges burning bright This is the circuit, canonical and true V1's magic making vision new [Verse 2] Layer four projects its data upward bound To superficial two and three where orientation's found Binocular fusion happens in this zone Both eyes together, no longer alone Feedforward highways carry signals ahead To higher cortex where complex forms are read [Chorus] Four takes input, two-three transform Five-six output in cortical form Monocular becomes binocular sight Circles turn to edges burning bright This is the circuit, canonical and true V1's magic making vision new [Bridge] Deep layers five and six control the flow Five to superior colliculus below Six sends feedback to LGN's gate Modulating four's receptive state The circuit loops, a neural conversation Each layer plays its role in visual sensation [Verse 3] Unoriented blobs become tilted lines Center-surround transforms to border designs Single eye input splits to double vision V1's computation makes the key decision From simple circles to complex detection This laminar flow builds our perception [Verse 4] Inhibition sculpts the neural dance GABAergic cells enhance the signal's chance Chandelier and basket cells refine The orientation columns, sharp and fine Horizontal connections spread across Linking similar angles, preventing loss [Chorus] Four takes input, two-three transform Five-six output in cortical form Monocular becomes binocular sight Circles turn to edges burning bright This is the circuit, canonical and true V1's magic making vision new [Chorus] Four takes input, two-three transform Five-six output in cortical form Monocular becomes binocular sight Circles turn to edges burning bright This is the circuit, canonical and true V1's magic making vision new [Outro] Six layers working, each with its part The canonical circuit, visual art From LGN to cortex above That's how the brain learns what to love
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