Q Angle
Background[edit | edit source]
Measurement[edit | edit source]
The knee is fully extended, but not hyper-extended,during measurements.
The Q angle is acute angle formed between:
- A line representing the resultant line of force of the quadriceps, made by connecting a point near the ASIS to the mid-point of the patella
- A line representing a long axis of the patellar tendon, made by connecting a point on the tibial tuberosity with the mid-point of the patella.
Normative Values[edit | edit source]
Factors affecting 'Q' Angle[edit | edit source]
Increases in q-angle are associated with [1]:
- Femoral anteversion
- External tibial torsion
- Laterally displaced tibial tubercle
- Genu valgus