[Verse 1] Single units firing in the cortex maze Neuropixels catching spikes through voltage waves Two-photon calcium glowing bright and slow Each method tells a different tale, you need to know Electrophysiology fast but spatially blind Calcium imaging sees cells but lags behind Space and time trade-offs in every tool we choose Pick your poison, accept what you will lose [Chorus] How do we know what neurons really do? Correlation ain't causation, that's the truth Decoders show what's there, not what gets used Methods make the message, don't get confused Record, stimulate, analyze, decode Every claim needs evidence on that road [Verse 2] fMRI blood flow painting pictures slow Spatial precision but temporal let-go MEG and EEG racing at light speed But where's it happening? Location's hard to read ECoG electrodes sitting on the brain Rare opportunity in the surgical game Human methods limited by what we can do Ethics and access constrain our view [Chorus] How do we know what neurons really do? Correlation ain't causation, that's the truth Decoders show what's there, not what gets used Methods make the message, don't get confused Record, stimulate, analyze, decode Every claim needs evidence on that road [Bridge] Optogenetics flashing blue light beams Chemogenetics and microstim schemes Lesions show us when the system breaks Causation finally for the research stakes But Jonas and Kording dropped that mic Even microprocessors fool our sight [Verse 3] Encoding models predict what cells should say Decoding backwards works the other way RSA comparing patterns in the space Dimensionality reduction finds the trace Deep networks mirror biological design But models are hypotheses by design Computational theories need the test Artificial systems put us to the test [Verse 4] Cross-validation splits your data clean Overfitting hides what patterns really mean Bootstrap confidence around each claim Reproducibility should be the aim Population vectors point the neural way But noise correlations change the play Theory-driven questions guide the path Not just fishing expeditions in the math [Chorus] How do we know what neurons really do? Correlation ain't causation, that's the truth Decoders show what's there, not what gets used Methods make the message, don't get confused Record, stimulate, analyze, decode Every claim needs evidence on that road [Outro] Stay humble with the data that you find Method-dependent truth should blow your mind Calibrate each claim against its source That's the neuroscientist's honest course
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