[Verse 1]
Skin electrode or needle slipped in deep,
Muscle fibers crackle, voltage traces leap,
Every motor unit's got its own little voice,
Recruitment order whispers which fiber makes the choice,
Surface patch for gross moves, needle for the fine,
Electromyography reads the body's underline.
[Chorus]
Músculo fala — EMG, EMG,
Spike and speak, that's the beat, você vê?
Position, velocity, o sino sobe e desce,
Straight path dançando, minimum jerk parece,
Força e cinemática, mão na mão, sempre juntas,
Músculo fala — ouve bem as perguntas.
[Verse 2]
Cameras on the ceiling catching every marker's glow,
Motion capture counts the where, the how-fast, and the grow,
Position is the first one, velocity's its child,
Acceleration's grandchild, changing rate gone wild,
Take the slope of distance, you will find the speed appear,
Take the slope of speed again, acceleration's here.
[Verse 3]
Watch the hand reach forward, no wobble, no detour,
A straight line to the target, elegant and pure,
Velocity starts at zero, climbs up like a hill,
Peaks out in the middle, falls back, calm and still,
That's the bell-shaped profile, smooth as poetry can get,
Minimum-jerk math says smoothness wins the bet.
[Chorus]
Músculo fala — EMG, EMG,
Spike and speak, that's the beat, você vê?
Position, velocity, o sino sobe e desce,
Straight path dançando, minimum jerk parece,
Força e cinemática, mão na mão, sempre juntas,
Músculo fala — ouve bem as perguntas.
[Verse 4]
KINARM grabs your arm in a robotic metal sleeve,
Force sensors feel the push and pull you wouldn't believe,
Perturbation shoves you sideways, watch how you correct,
Catch trials and curl fields test what muscles expect,
Devagar ou depressa, a força vai medir,
Every twitch and torque, deixa o robô sentir.
[Bridge]
Speed against accuracy, a trade-off old and true,
Adaptation studies watch how errors residue,
Metrics from the movement — reaction time, the drift,
Teach us how the brain and body learn to shift,
Dados são a história, numbers never lie,
From spike to step to stumble, watch the pattern justify.
[Verse 5]
Signal processing filters out the noise and hum,
Rectify and smooth it till the envelope has come,
Co-contraction patterns show the stiffness in the joint,
Agonist and antagonist, each making their own point,
Tudo se conecta, do nervo até o gesto,
Ciência do movimento, revelando o seu contexto.
[Chorus]
Músculo fala — EMG, EMG,
Spike and speak, that's the beat, você vê?
Position, velocity, o sino sobe e desce,
Straight path dançando, minimum jerk parece,
Força e cinemática, mão na mão, sempre juntas,
Músculo fala — ouve bem as perguntas.
[Outro]
Electrode, camera, robot arm combined,
Reading every reach the body has designed,
Músculo fala, o corpo não mente não,
EMG and kinematics — essa é a lição.