Notes on menisci anatomy…
- Composition
fibroelastic cartilage.
interlacing network of collagen, proteoglycan, glycoproteins, and cellular elements.
composed of 65-75% water.
Collagen
90 % Type I collagen
- shape
- medial meniscus
stretched-out, C-shape with triangular cross section.
- lateral meniscus
more circular in shape.
covers larger area of articular surface.
- Blood supply
- medial inferior genicular artery
supplies peripheral 20-30% of medial meniscus.
- lateral inferior genicular artery
supplies peripheral 10-25% of lateral meniscus.
- synovial fluid
central 75% of meniscus’ receive nutrition through diffusion.
