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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.

Anatomy Standard

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74,960 次观看 • 1 年前 •via X (Twitter)

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Seokjin and the staff reaction about the shoulder being exposed on ibt: 🐹look look you can even see my muscles!! 👤your biceps are insane 👤triceps,triceps 👤triceps not biceps! Triceps! THEY ARE SO REAL😭😭

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