[Verse 1]
Picture the hand before it even moves,
a storm of neurons rehearsing what to prove,
M1 fires same cells for the plan and the deed,
is it muscle, is it motion, or the dynamics that you need?
Preparation's a held breath, a loaded spring,
execution drops the gate and lets the tension sing,
same neurons, different gain, one circuit wearing two coats,
nobody's cracked the cipher though we've counted all the votes.
[Chorus]
Cortex, ganglia, cerebellum, three detectives on the case,
one learns from reward, one learns from the error on your face,
mnemonic for the ages: plan, predict, and then repair,
open questions, open synapses, electricity in the air.
[Verse 2]
Basal ganglia tastes the outcome, sour or sweet,
dopamine the ledger keeping score of each defeat,
cerebellum watches sideways, measuring the miss,
error as a teacher, correcting with a hiss,
cortex sits between them, stitching maps of skill,
how they split the labor, scientists debate it still,
is it purely carrot, purely cane, or a marriage of the two,
the brain won't hand us schematics, so the guesswork's overdue.
[Chorus]
Cortex, ganglia, cerebellum, three detectives on the case,
one learns from reward, one learns from the error on your face,
mnemonic for the ages: plan, predict, and then repair,
open questions, open synapses, electricity in the air.
[Verse 3]
Deep along the midline, SMA and CMA hum,
whispering the urge before the finger moves a crumb,
call it quiescence, the hush before the will,
electrodes catch a ramping wave, the famous readiness thrill,
does that rising signal mean the choice was already made,
before you knew you'd chosen, in some neural masquerade?
Libet's ghost still lingers, arguing in every lab,
is intention a decision, or an echo, or a tab?
[Verse 4]
After stroke the muscles sulk, the proportional rule predicts,
some regain a fixed percent, like physics, not like tricks,
but timing matters, windows shut if we wait too long to try,
stimulate the cortex gently, give the circuit a reason why,
a BCI can loan a hand, translating thought to motion,
pairing therapy with current like a tide against the ocean,
beyond the rule, beyond the chart, we're hunting for the lever,
that turns a stubborn, sleeping limb into a waking endeavor.
[Bridge]
Mice have motor cortex, but a thinner, humbler thread,
no straight wire to the spinal cord, no corticomotoneuron bed,
so when the rodent data sings, we hum along with care,
a palimpsest of circuits, old notes written everywhere,
layers scratched and written over, species changing the design,
what translates and what doesn't is the question of our time.
[Chorus]
Cortex, ganglia, cerebellum, three detectives on the case,
one learns from reward, one learns from the error on your face,
mnemonic for the ages: plan, predict, and then repair,
open questions, open synapses, electricity in the air.