Question 67

The quadriceps femoris muscle holds the patella in place.

The quadriceps femoris is a group of muscles located at the front of the thigh that is primarily responsible for extending the knee joint and stabilizing the patella.

A) Triceps brachii

The triceps brachii is a muscle located at the back of the upper arm, primarily responsible for elbow extension. It does not play a role in stabilizing or holding the patella in place as it is not involved in knee joint mechanics.

B) Gastrocnemius

The gastrocnemius is a muscle in the calf that helps with plantarflexion of the foot and flexion of the knee. While it is important for lower leg movement, it does not hold the patella in place and does not have a direct role in stabilizing the knee joint.

C) Latissimus dorsi

The latissimus dorsi is a large muscle in the back that is involved in the movement of the shoulders and arms. It has no anatomical connection to the knee or patella, making it irrelevant to the question of which muscle stabilizes the patella.

D) Quadriceps femoris

The quadriceps femoris is the primary muscle that holds the patella in place through its tendon, which forms the patellar tendon. This muscle group is crucial for knee extension and provides stability to the knee joint, directly impacting the positioning of the patella.

Conclusion

The quadriceps femoris is the only muscle among the options that directly stabilizes the patella, making it the correct answer. The other options, while significant in their respective functions, do not contribute to the stabilization of the patella, thus confirming that D is the only appropriate choice.