Lab 13: iWorx EMG Activity of Antagonist Muscles: wrist Flexion and Extension and Arm Wrestling

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Anterior surface leads for flexion/extension

Red + closest to elbow over flexors Black - most distal to elbow over flexors ground intermediate and lateral to the red and black leads

Percent diff in abs. int. in agonist vs antagonist

agonist abs. int - antagonist/ agonist

which muscles were agonist during flexion

anterior muscles

Antagonist

muscles that work in opposition to each other, opposes desired movement

Agonist

muscles that work together, gives desired movement

which muscles were agonist during extension

posterior muscles

Lead placement for arm wrestling

red - lateral edge of anterior surface of forearm over the pronator teres, close to wrist black - middle of anterior surface of forearm closer to elbow and medial to red white - on biceps brachii near elbow brown - on biceps brachii proximal to white

Posterior surface leads for flexion/extension

white +2 closest to elbow over extensors brown -2 more distal to elbow over extensors


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