College of Massage Therapists of British Columbia (CMTBC) Practice Exam

What does the Q angle measure and how is it assessed?

1. Angle from ASIS to the lateral malleolus

2. Angle from ASIS to patella to tibial tuberosity

3. Angle from patella to tibial tuberosity

4. Angle from pelvis to femur

The correct answer is: Angle from ASIS to patella to tibial tuberosity

The Q angle, or quadriceps angle, measures the angle formed by the intersection of two lines: one that runs from the anterior superior iliac spine (ASIS) to the center of the patella and another that extends from the center of the patella to the tibial tuberosity. This angle is significant in assessing the alignment of the knee and its potential impact on knee mechanics and patellofemoral function. A larger Q angle can indicate a tendency toward dynamic knee valgus, which may predispose individuals to knee injuries and conditions such as patellar instability or anterior knee pain. The assessment typically involves the individual standing or lying down, with the therapist identifying the landmarks accurately to ensure the measurement is valid. By using this specific method of measurement, practitioners can gain insights into a patient's gait, alignment, and potential areas of concern in lower limb biomechanics. The correct choice highlights both the anatomical landmarks involved in the measurement and the importance of evaluating the relationship between these points for comprehensive assessment.