Which part of the meniscus is known to be vascularized and innervated?

Which part of the meniscus is known to be vascularized and innervated?

• A. Inner 1/3
• B. Outer 1/3
• C. Center
• D. Both inner and outer

Answer: (B)

The outer 1/3 of the meniscus is the region that is vascularized and innervated. This part of the meniscus, often referred to as the red zone, receives blood supply from the outer joint capsule and is more likely to heal if injured compared to the inner regions, which are avascular and rely on synovial fluid for nourishment. Because of this blood supply, the outer portion experiences a greater capacity for repair and regeneration, which is crucial for maintaining knee joint health and function. Additionally, the presence of sensory nerves in the outer third contributes to its involvement in proprioception and pain perception. This is important for the overall function of the knee, as it helps regulate movements and protect the joint from excessive strain. Understanding the vascular and innervation characteristics of the meniscus is key in evaluating knee injuries and developing appropriate treatment plans.

The outer 1/3 of the meniscus is the region that is vascularized and innervated. This part of the meniscus, often referred to as the red zone, receives blood supply from the outer joint capsule and is more likely to heal if injured compared to the inner regions, which are avascular and rely on synovial fluid for nourishment. Because of this blood supply, the outer portion experiences a greater capacity for repair and regeneration, which is crucial for maintaining knee joint health and function.

Additionally, the presence of sensory nerves in the outer third contributes to its involvement in proprioception and pain perception. This is important for the overall function of the knee, as it helps regulate movements and protect the joint from excessive strain. Understanding the vascular and innervation characteristics of the meniscus is key in evaluating knee injuries and developing appropriate treatment plans.