This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
In posterior compament syndrome which passive movement causes pain? 
Select and explain. 
A. Dorsiflexion of foot, B. Foot inversion, C. Toe dorsiflexion, D. Toe planter flexion
C: Toe dorsiflexion
Answer: C: Toe dorsiflexion 
Explanation: C. i.e. Toe dorsiflexion Compament syndrome is clinically diagnosed by high index of suspicion in any patient with pain out of propoion to injury, who is unresponsive b/O associated head or other injury. Physical findings that warn are pain on passive range of motion of toes causing affected compamental muscles stretchQ, and tense compaments that are tender on palpation. So compament syndrome affecting posterior leg can be earliest diagnosed by passive stretch of toe plantiflexiors that occurs during (passive) toe, dorsiflexion movementQ.