[Verse 1] In the gap between two neurons, a tiny stage of light, Glutamate steps up first, she's the spark that starts the fight, She's the gas pedal, excitatory queen of the brain, Every thought you're thinking rides on her electric train. But someone's got to brake it, or the circuit burns too fast, GABA walks in cool and calm, the inhibitor of the cast, She's the main one in the brain, she hushes neurons down, Sem ela, tudo explode — she's the quiet of the town. [Chorus] Esse é o elenco, the neurotransmitter crew, Glutamate aperta o gás, GABA says "shh," it's true, Cada um tem seu papel, every actor plays a part, Sinapse é o palco — this is chemistry of heart. Cast it, release it, cruza o vão e sente, This is how the brain talks, silently, urgently. [Verse 2] Down in the spinal cord, Glycine takes the inhibiting role, Brainstem and the backbone, she keeps the reflex in control, Meanwhile Acetylcholine's got three jobs on her plate, At the muscle junction, she tells your bicep: contract, don't wait, In autonomic nerves she's whispering to your heart and gut, Up in cortex circuits, she sharpens focus, locks the shutter shut, Attention and memory, she's the usher in the hall, Guiding the spotlight so you don't forget it all. [Chorus] Esse é o elenco, the neurotransmitter crew, Glutamate aperta o gás, GABA says "shh," it's true, Cada um tem seu papel, every actor plays a part, Sinapse é o palco — this is chemistry of heart. Cast it, release it, cruza o vão e sente, This is how the brain talks, silently, urgently. [Verse 3] Now meet the monoamine trio, dançando no camarim, Dopamine's the hustler, chasing reward without the end, She fuels your movement, motivation, the reach-for-more design, Serotonin's calmer, tunes your mood, your sleep, your appetite, Norepinephrine shouts "alerta!" when the danger's in your sight, Fight-or-flight ignition, the body's siren screams inside. [Bridge] Histamine, ATP, neuropeptides linger near, Supporting cast of messengers, extras who still steer, But Dale's principle declares — Eccles put it in a frame — One neuron, one transmitter set, released at every claim, So we label by the chemical: glutamatergic, cheio de luz, GABAergic, dopaminergic — named for the signal it conduz. [Chorus] Esse é o elenco, the neurotransmitter crew, Glutamate aperta o gás, GABA says "shh," it's true, Cada um tem seu papel, every actor plays a part, Sinapse é o palco — this is chemistry of heart. Cast it, release it, cruza o vão e sente, This is how the brain talks, silently, urgently. [Outro] Glutamate, GABA, glycine, cholinergic cheer, Dopamine, serotonin, norepinephrine — now hear, O elenco completo, taking every cue with grace, Neurotransmitters cast the brain — their signals interlace.
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