Boutonniere deformity mnemonic 'Like pushing a button' is used to remember which deformity?

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Prepare for the 450 Formula Upper Extremity Test. Study with interactive flashcards and comprehensive multiple choice questions, each offering detailed explanations. Get exam ready now!

Multiple Choice

Boutonniere deformity mnemonic 'Like pushing a button' is used to remember which deformity?

Explanation:
The idea being tested is how mnemonics map to a specific hand deformity. “Like pushing a button” cues you to a buttonhole—the deformity known as Buttonhole deformity, which is the same condition as boutonniere deformity. This injury occurs when the central slip of the extensor tendon at the PIP joint is damaged, causing the PIP to flex while the DIP may hyperextend. It’s distinct from Jersey finger (involves inability to flex the DIP) and from Swan neck deformity (PIP hyperextension with DIP flexion). So the mnemonic helps you recall boutonniere/buttonhole deformity rather than the others.

The idea being tested is how mnemonics map to a specific hand deformity. “Like pushing a button” cues you to a buttonhole—the deformity known as Buttonhole deformity, which is the same condition as boutonniere deformity. This injury occurs when the central slip of the extensor tendon at the PIP joint is damaged, causing the PIP to flex while the DIP may hyperextend. It’s distinct from Jersey finger (involves inability to flex the DIP) and from Swan neck deformity (PIP hyperextension with DIP flexion). So the mnemonic helps you recall boutonniere/buttonhole deformity rather than the others.

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