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

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

• A. Jersey finger
• B. Like pushing a button
• C. Buttonhole deformity
• D. Swan neck deformity

Answer: (B)

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.