Femur Bone - Anterior and Posterior Markings
Patella Bone – Anterior and Posterior Views
Introduction to Patella bone anatomy:
- It is located directly anterior to a groove between the femur condyles called the patellar surface.
- Two facets (or depressions) on the posterior side of the patella articulate with the medial and lateral femur condyles.
- The patella is embedded in the quadriceps tendon, which makes it the largest sesamoid (= tendon embedded) bone in the body.
- It functions to displace the tendon away from the femurotibial joint surface.
- This increases the lever arm of the tendon and the tension applied to the tibia when the knee extends.
Feeling lost and confused on where to start learning anatomy? Check out this comprehensive anatomy study guide.
Markings of the Patella Bone:
- Base (basis patellae) is the broad, convex superior margin of the patella, which serves as an attachment point for the quadriceps tendon.
- Apex (apex patellae) is the pointed inferior margin of patella. This region serves as an attachment point for the patellar ligament, which is an inferior extension of the quadriceps tendon.
- Lateral articular facet (facies articularis lateralis) is the larger of two shallow depressions on the posterior surface of the patella, which articulates with the lateral condyle of femur.
- Medial articular facet (facies articularis medialis) is the smaller of two shallow depressions on the posterior surface of the patella, which articulates with the medial condyle of femur.
Anterior view and Posterior view: Show/hide answers
Interactive quiz about the patella
Patella Bone Quiz – Anterior and Posterior Markings