[Verse 1]
Bernstein said there's a hundred roads to lift a cup of tea,
Joints and muscles, degrees of freedom running free,
The brain don't micromanage every wobble, every sway,
It lets the slack ride loose and grabs what strays away.
[Chorus]
Minimal intervention, só o que importa, vai —
Fix the error that matters, deixa o resto, deixa, vai
Kalman filter whispers, a controller holds the rein,
Custo contra precisão, effort pulling against the gain
Todorov e Jordan showed the brain's a quiet guide,
Correção mínima — let the extra wobble slide
[Verse 2]
Inside your skull a filter runs, prediction meets the sense,
Noisy eyes, noisy muscles, static on the fence,
Signal-dependent noise grows loud the harder that you push,
So the estimator blends the guess with what the senses rush,
Not memory alone, not the eyeball on its own,
Kalman weighs the two and calls the state its own.
[Chorus]
Minimal intervention, só o que importa, vai —
Fix the error that matters, deixa o resto, deixa, vai
Kalman filter whispers, a controller holds the rein,
Custo contra precisão, effort pulling against the gain
[Verse 3]
Now the controller's watching, dialing gains like tuning strings,
Loose where it's irrelevant, tight on the one thing,
A cost function keeps the ledger — effort on one coast,
Accuracy on the other, balanced when it matters most,
Reach for your coffee cup, don't fix every twitch in hand,
The task decides the discipline, the brain just makes the plan.
[Bridge]
Stephen Scott set the stage, watched the cortex play its part,
Long-latency answers, quick but smart,
M1's response shifts shape with every task you're given,
Proof the cortex steers, not just a spinal piston,
Não é só reflexo, não — there's a mind behind the motion,
Correção, correção, cortical devotion
[Chorus]
Minimal intervention, só o que importa, vai —
Fix the error that matters, deixa o resto, deixa, vai
Kalman filter whispers, a controller holds the rein,
Custo contra precisão, effort pulling against the gain
[Verse 4]
Watch the hand in darkness, reaching blind across the night,
Still it finds the target, still it finds the line just right,
Internal model carries what the eyes can't hold in view,
Forward model racing faster than the feedback ever knew,
Delay's the enemy, the loop has lag to burn,
So the brain predicts the future, waits for sense to confirm,
Compare, correct, repeat — the cycle never ends,
Estimation and control, forever intertwined as friends,
Synergies emerge not coded line by line,
But born from cost and noise and time, an elegant design.