Which of the following is a rupture of the central extensor tendon that causes the lateral bands to slip palmarly on each side of the PIP,changing its line of pull on this joint from an extensor to a flexor?
A) Boutonnière deformity
B) Mallet finger
C) Jerry finger
D) Pseudoboutonnière deformity

Question

Quizplus · Accepted Answer

Boutonnière deformity is characterized by a rupture of the central extensor tendon at the level of the proximal interphalangeal (PIP) joint, which leads to the lateral bands slipping palmarly. This changes their line of pull from an extensor to a flexor position at the PIP joint, causing the characteristic flexion of the PIP joint and extension of the DIP joint.

Which of the Following Is a Rupture of the Central