Patellar plexus

Diagram of the patellar plexus and surrounding nerves.

The patellar plexus is a network of nerves located around the patella, or kneecap, which is part of the knee joint. This plexus is primarily involved in the sensory innervation of the anterior aspect of the knee.

Anatomy

The patellar plexus is formed by the convergence of several nerves that provide sensory innervation to the skin over the patella and the surrounding area. These nerves include branches from the following:

• The femoral nerve, specifically the saphenous nerve, which is the largest cutaneous branch of the femoral nerve.
• The lateral femoral cutaneous nerve, which supplies the skin on the lateral aspect of the thigh and contributes to the lateral part of the plexus.
• The anterior femoral cutaneous nerve, which provides sensation to the anterior and medial aspects of the thigh.

Function

The primary function of the patellar plexus is to provide sensory innervation to the skin overlying the patella and the anterior knee region. This sensory input is crucial for proprioception and the protective reflexes of the knee joint.

Clinical Significance

Injury or irritation to the nerves forming the patellar plexus can lead to sensory disturbances such as numbness, tingling, or pain in the anterior knee region. Such conditions may arise from trauma, surgical procedures, or compression of the nerves.

Related Structures

The patellar plexus is closely associated with other structures of the knee joint, including:

• The patellar tendon, which connects the patella to the tibia.
• The quadriceps femoris muscle, which is responsible for extending the knee.
• The knee joint, a complex synovial joint that allows for flexion and extension of the leg.

Related Pages

• Knee joint
• Femoral nerve
• Saphenous nerve
• Lateral femoral cutaneous nerve
• Anterior femoral cutaneous nerve