What is the function of the meniscus?
What is the function of the meniscus?
The menisci — the medial meniscus and lateral meniscus – are crescent-shaped bands of thick, rubbery cartilage attached to the shinbone (tibia). They act as shock absorbers and stabilize the knee.
What is the function of the menisci quizlet?
It is on the medial (inner) side of the knee joint in humans and other primates. Its primary function is to resist valgus forces on the knee.
What is meniscus quizlet?
Meniscus. The curve at the surface of a liquid.
What cells make up the meniscus?
The main cell type in the inner and middle part of the meniscus has been termed the fibrochondrocyte4. This cell is defined as round or oval shaped surrounded by an abundant ECM4, 10. The outer one-third of the meniscus is populated by mainly fibroblast-like cells within a dense connective tissue10.
How does the meniscus stabilize the knee?
Menisci function to provide stability to the knee by spreading the weight of the upper body across the whole surface of the tibial plateau. The menisci help in load bearing by preventing the weight from concentrating onto a small area, which could damage the articular cartilage.
How does a torn meniscus affect the function of the knee joint?
A healthy meniscus acts as a shock absorber and provides a smooth surface for your knee to glide on. A tear in the meniscus prevents your knee from rotating, causing pain and locking.
What functions are served by the menisci found in some synovial joints?
Function. The menisci act to disperse the weight of the body and reduce friction during movement. Since the condyles of the femur and tibia meet at one point (which changes during flexion and extension), the menisci spread the load of the body’s weight.
What is the function of the menisci found on the proximal tibia?
In the knee, the crescent-shaped menisci are positioned between the ends of the upper (femur) and lower (tibia) leg bones. The menisci protect the joint surface and absorb the shock produced by activities such as walking, running, and jumping.
What is a meniscus line?
A meniscus is a curve in the surface of a molecular substance (water, of course) when it touches another material. With water, you can think of it as when water sticks to the inside of a glass.
What is the function of the labrum in the Humeroscapular joint?
The labrum borders the articular surface of the glenoid. When these two groups of structures come into contact motion is limited unless the cuff insertions slide past the labrum and into the joint. Bony factors can limit the range of humeroscapular motion.
What holds meniscus in place?
The menisci are attached to each other via the transverse ligament.
What type of joint is the meniscus?
knee-joint
A meniscus is a crescent-shaped fibrocartilaginous anatomical structure that, in contrast to an articular disc, only partly divides a joint cavity….Meniscus (anatomy)
| Meniscus | |
|---|---|
| Left knee-joint from behind, showing interior ligaments | |
| Details | |
| Identifiers | |
| Latin | Menisci |
What is the function of the menisci of the knees?
The menisci of the knees are 2 fibrocartilaginous discs whose unique biochemical composition and structure play a vital role in their ability to improve joint congruity, to handle load transmission, and to act as shock absorbers.
What is the function of the cellular elements of the knee?
Cellular elements. This arrangement provides great elasticity and ability to withstand compression. The main blood supply to the meniscus of the knee comes from: The lateral geniculate artery: Supply 10-25 % from peripheral region of the lateral meniscus. Medial geniculate artery: Supply 20-30 % from peripheral region of the medial meniscus.
What happens to the number of cells in the meniscus during pregnancy?
During the gestational period, the developing menisci are highly cellular in the beginning and the nucleus–cytoplasm ratio is high. In time, these cells mature and the nucleus–cytoplasm ratio declines. While the number of cells decreases, their collagen production increases.
What is the stability of the meniscus?
Joint Stability. ## The superior surface of each meniscus is concave, enabling effective articulation between the convex femoral condyles and flat tibial plateau. When the meniscus is intact, axial loading of the knee has a multidirectional stabilizing function, limiting excess motion in all directions.
