[Verse 1] Down in the retina where vision starts to grow Ganglion cells are tiny, just a tenth degree or so They catch the smallest details in the foveal core But as signals climb the ladder, fields expand much more From RGC to cortex, each stage multiplies by ten Trading sharp precision for a broader viewing pen [Chorus] Ten times bigger, ten times wider As you climb the neural tower Point-one grows to one degree V2 doubles what you see Four to eight in V4's domain MT spreads across the plane IT sees fifty degrees wide Receptive fields on a climbing ride [Verse 2] V1 takes that retinal whisper, makes it half a degree Simple cells and complex ones processing what we see But V2 doubles down the bet, two degrees in span Building textures, shapes, and edges with a broader plan Each ascending cortical stage sacrifices the precise For invariance and abstraction, that's the neural price [Chorus] Ten times bigger, ten times wider As you climb the neural tower Point-one grows to one degree V2 doubles what you see Four to eight in V4's domain MT spreads across the plane IT sees fifty degrees wide Receptive fields on a climbing ride [Bridge] From arcminutes to degrees, the progression never lies Motion flows through MT's channels, ten degrees comprise While IT neurons span the vista, fifty degrees or more Including foveal territory in their receptive store Spatial detail sacrificed for categorical might Abstract recognition blooming from the sharpest sight [Verse 3] V4 color processing with its eight-degree embrace Objects forming, surfaces merging across visual space The hierarchy's ancient wisdom, magnification's law Every stage pays resolution for the patterns that it saw From fine-grained local features to the forest from the trees Visual cortex builds its empire through expanding boundaries [Verse 4] Evolution's clever solution to the processing bind How to capture both the details and the scene combined Parallel pathways streaming upward through the visual maze What and where streams diverging in their separate ways Small fields catch the features while the large ones track the flow This distributed architecture makes perception grow [Chorus] Ten times bigger, ten times wider As you climb the neural tower Point-one grows to one degree V2 doubles what you see Four to eight in V4's domain MT spreads across the plane IT sees fifty degrees wide Receptive fields on a climbing ride [Outro] So remember when you're learning how the brain decodes the scene Size progression tells the story of the visual machine Trading pixels for the meaning, local detail for the whole Receptive field expansion plays the starring role
← Cell and channel counts (human, per eye unless noted) | Cortical magnification →