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A look at the muscles at work during arm flexion and extension. Flexion activates the biceps brachii, brachialis, brachioradialis, extensor carpi radialis longus, and extensor carpi radialis brevis, while extension engages the triceps brachii and anconeus.

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Anatomy Standard

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74,381 просмотров • 1 год назад •via X (Twitter)

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