A movement coordination deficit for PFPS is characterized by:

A movement coordination deficit for PFPS is characterized by:

• A. Excessive or poorly controlled knee valgus during a dynamic task not necessarily due to LE weakness
• B. Hip abductor weakness as the sole cause
• C. Pain only in medial knee
• D. Injury to ACL

Answer: (A)

When patellofemoral pain syndrome is described as a movement coordination deficit, the defining feature is an excessive or poorly controlled knee valgus during dynamic tasks. This reflects neuromuscular control and motor timing issues around the knee rather than a simple, isolated strength loss. In real tasks like squatting, landing, or cutting, the knee collapses inward (valgus) as the hip and thigh move, often with the thigh internally rotating and the foot pronating. This misalignment increases lateral patellar contact and PF joint stress, contributing pain. Hip abductor weakness can contribute to valgus but isn’t the sole or defining cause in this classification, which centers on coordination and control rather than a single strength deficit. Pain in PFPS is typically around the patella rather than limited to the medial knee, and an ACL injury represents a different pathology altogether, not a movement coordination pattern of PFPS.

When patellofemoral pain syndrome is described as a movement coordination deficit, the defining feature is an excessive or poorly controlled knee valgus during dynamic tasks. This reflects neuromuscular control and motor timing issues around the knee rather than a simple, isolated strength loss. In real tasks like squatting, landing, or cutting, the knee collapses inward (valgus) as the hip and thigh move, often with the thigh internally rotating and the foot pronating. This misalignment increases lateral patellar contact and PF joint stress, contributing pain.

Hip abductor weakness can contribute to valgus but isn’t the sole or defining cause in this classification, which centers on coordination and control rather than a single strength deficit. Pain in PFPS is typically around the patella rather than limited to the medial knee, and an ACL injury represents a different pathology altogether, not a movement coordination pattern of PFPS.