[Verse 1] Deep in the cortex where signals collide Scientists mapped out the neural divide Bastos and Fries with their laminar probe Found frequency codes in each brain episode Feedforward messages ride the fast lane Gamma waves pulsing through cortical terrain Forty to eighty hertz climbing up high From superficial layers reaching the sky [Chorus] Alpha beta flowing down the deep layer highway Gamma theta climbing up the surface byway Eight to thirty hertz for feedback's call Forty plus for feedforward through it all Different frequencies for different directions Neural multiplexing through oscillation connections [Verse 2] Bottom-up evidence surfs on gamma Theta waves join in this neural drama Superficial layers broadcast the news While deep layer channels sing feedback blues Alpha and beta descend from above Top-down predictions like hand in glove Same anatomical loop carries both streams Separated by frequency engineering schemes [Chorus] Alpha beta flowing down the deep layer highway Gamma theta climbing up the surface byway Eight to thirty hertz for feedback's call Forty plus for feedforward through it all Different frequencies for different directions Neural multiplexing through oscillation connections [Bridge] Communication through coherence speaks the truth Phase alignment makes the connection proof When excitability rhythms sync in time Information flows in perfect rhyme Granger causality revealed the code Directional signatures on each neural road [Verse 3] Cortical traffic has a measurable sign Frequency bands drawing the dividing line Feedforward gamma racing toward the peak Feedback alpha beta playing hide and seek Modern neuroscience cracked the mystery wide How the brain sorts signals on each neural side Oscillatory channels keep the data clean Most elegant system you've ever seen [Verse 4] Layer four receives the sensory data Layer two three sends it up like strata Layer five six connecting back below Hierarchical processing in rhythmic flow Visual cortex shows the clearest trace Each frequency finding its proper place Million years of evolution's design Built this multiplexed communication line [Chorus] Alpha beta flowing down the deep layer highway Gamma theta climbing up the surface byway Eight to thirty hertz for feedback's call Forty plus for feedforward through it all Different frequencies for different directions Neural multiplexing through oscillation connections [Outro] In the cortical blues of image processing Frequency bands keep the signals progressing From superficial peaks to the deep layer floor Brain's got the rhythm we're still exploring
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