Q angle # Quadriceps angle and Patellofemoral biomechanics

Detailed description of Q angle also known as quadriceps angle and its biomechanical signifiance.The neteffect of pull of quadriceps muscle and patellar tendon are analysed clinically by using this q angle. Its angle formed between line joining ASIS and MID POINT of patella with line joining MIDPOINT of patella with tibial tuberosity.
The normal value of Q angle is 10-15 degree and an alteration in Q angle shows there is increased lateral pull on patella which can lead to decrease in patellar stabilization.Some studies show that Q angle is higher in females due wider pelvis etc.
When Q angle is increased it lead on to increase in lateral pull of patella,which can lead to patellar subluxation,or dislocation.There are several abnormalities that can lead on to increase lateral forces on patella such as GENU VALGUM,IT BAND TIGHTNESS,MEDIAL FEMORAL TORSION,PRONATION OF FOOT,LATERAL TIBIAL TORSION.
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