Structure and Function of the Knee Joint

Bursae Around the Knee Joint

The knee joint is a complex structure responsible for movement and weight-bearing. It consists of bones, cartilage, ligaments, and bursae that help reduce friction between tissues.

Understanding the Bursae

Bursae are fluid-filled sacs that cushion and protect the knee joint. There are several important bursae in the knee:

• Prepatellar Bursa: Located in front of the patella, it helps prevent friction between the skin and the kneecap.
• Infrapatellar Bursa: Found beneath the patella, it reduces friction between the patellar tendon and the underlying structures.
• Suprapatellar Bursa: Positioned above the patella, it allows smooth movement between the femur and the quadriceps muscle.
• Pes Anserine Bursa: Located on the inner side of the knee, it cushions the tendons of the hamstring muscles.

Functions of the Knee Bursae

The bursae play a crucial role in knee mechanics by:

• Reducing friction between tissues.
• Facilitating smooth movement of muscles and tendons.
• Providing cushioning to protect the knee from impact.

Common Bursae-Related Conditions

Bursitis is a condition where the bursae become inflamed due to repetitive stress or injury. Symptoms include pain, swelling, and tenderness. Treatment options include rest, ice therapy, and anti-inflammatory medications.

Conclusion

The knee joint is an essential component of human mobility, and its bursae play a significant role in ensuring smooth and pain-free movement. Understanding their function can help in preventing and managing knee-related conditions.