Final answer:
Luxating patella is a condition where the kneecap moves out of its normal position. It is caused by an imbalance in the pull of the quadriceps femoris muscle. Treatment involves rest, gradual resumption of activity, and strengthening of the quadriceps femoris muscle.
Step-by-step explanation:
The condition being described is called Luxating Patella, also known as a trick knee. It is a condition where the patella (kneecap) tends to move out of its normal position, usually towards the lateral side of the knee. This can result in pain and potential damage to the knee joint.
Luxating patella is caused by an imbalance in the pull of the quadriceps femoris muscle, which can lead to abnormal tracking of the patella. Treatment usually involves rest, followed by gradual resumption of activity and proper strengthening of the quadriceps femoris muscle to correct imbalances and prevent recurrence.