[Verse 1]
Nineteen sixty-five, two Germans in a lab
Kornhuber and Deecke caught a whisper, not a stab
A slow and creeping voltage, sinking down with time
A full two seconds early, way before the mime
They named it Bereitschaftspotential, readiness in disguise
A quiet dip in voltage underneath your eyes
No flash, no drum roll, just a gentle fading tide
Your brain is clearing runway while your hand's still at your side
[Chorus]
Ready, steady, dipping low
Bereitschaftspotential, here we go
SMA starts whispering first in line
Then motor cortex crosses the midline
Slow build before you ever choose
Half a second, free will in the news
Ready, steady, dipping low
That's the signal, that's the undertow
[Verse 2]
First the SMA and pre-SMA, planners in the back
Humming general orders on a silent track
Then it tilts and leans, picks a hand, a side
Premotor and M1 join the final stride
The early slope is bilateral, calm and symmetric
Later on it's lateralized, sharp and electric
One brain region passes it like runners in a race
EEG is watching, tracing every trace
[Verse 3]
Nineteen eighty-three, Libet ran the clock
Asked folks when they felt the urge, a mental tick-tock
Watched the dot spin round the screen, they'd name the time
Found the ripple started full three-fifty milliseconds prior
So the brain decides before you know you've planned
Philosophers lost sleep, debate got out of hand
Did your will just rubber-stamp a choice already made
Or is something else going on beneath that fading shade
[Chorus]
Ready, steady, dipping low
Bereitschaftspotential, here we go
SMA starts whispering first in line
Then motor cortex crosses the midline
Slow build before you ever choose
Half a second, free will in the news
Ready, steady, dipping low
That's the signal, that's the undertow
[Bridge]
Schurger, twenty-twelve, came in with a twist
Said the dip's not a decision, just statistical mist
Neurons drift like static, random noise that climbs
A threshold gets crossed sometime, not on a hidden timeline
No secret verdict waiting in the dark before you stir
Just fluctuation tipping over — maybe free will's still here
[Verse 4]
So the squiggle on the EEG, that falling, sloping line
Is motor prep in progress, not a crystal ball divine
It's a method, not a verdict, a window we can read
Measuring the prelude to a voluntary deed
From Kornhuber's first finding to Schurger's noisy wave
The readiness potential's still a mystery to engrave
[Chorus]
Ready, steady, dipping low
Bereitschaftspotential, here we go
SMA starts whispering first in line
Then motor cortex crosses the midline
Slow build before you ever choose
Half a second, free will in the news
Ready, steady, dipping low
That's the signal, that's the undertow
[Outro]
Dipping, drifting, crossing the line
Readiness potential, running on time
Noise or notion, nobody knows
That's the undertow, that's the undertow