Flashcards in Joints of Lower Limb Deck (28):
what type of joint is the hip joint?
what are the articulating surfaces of the hip joint?
head of femur and acetabulum of pelvis
name the intracapuslar ligament of the hip joint?
ligament to the head of the femur
how many extracapsular ligaments does the hip joint have?
name the 3 extracapsular ligaments of the hip joint?
iliofemoral, puboremoral and ischiofemoral
what is the function of the iliofemoral ligament?
where is the iliofemoral ligament located?
where is the pubofemoral ligament located?
anterior and inferiorly
what is the function of the pubofemoral ligament?
prevents excessive abduction and extension
which ligament of the hip joint is located posteriorly?
what is the function of the ischiofemoral ligament?
prevents extension of femur at hip
what are the stabilising factors of the hip joint?
acetabulum - deep, encompasses almost whole head of femur
acetabular labrum - fibrocartilaginous collar, deepends articulation
ligaments - very strong, spiral arrangement
what type of joint is the knee joint?
hinge type synovial
what are the articulating surfaces of the knee joint?
tibiofemoral articulation - medial/lateral condyles of femur articulating with tibia
patellofemoral articulation - anterior and distal part of femur artoculating with patella
what is the function of the patellofemoral articulation?
allows quadriceps femoris tendon to be inserted directly over knee, increasing efficiency of muscle as an extensor
which articulation at the knee is weightbearing, tibiofemoral or patellofemoral?
which meniscus is attached to a collateral ligament?
medial, attached to MCL and so may be damaged if MCL is ruptured
what are the functions of the menisci?
deepen articular surfaces to increase stability
act as shock absorbers
name the 5 ligaments of the knee
medial and lateral collaterals
anterior and posterior cruciates
what is the function of the ACL?
prevents anterior dislocation of knee
what is the function of the PCL?
prevents posterior dislocation of knee
what type of joint is the ankle joint?
hinge type synovial
what are the articulating surfaces of the ankle joint?
tibia and fibula and talus
what type of joint is the distal tibiofibular joint?
what causes the increase in stability at the ankle joint when foot is dorsiflexed?
talus is wedge-shaped, wider at distal end, and so the articulating portion increases in width as dorsiflexion increasing, increasing stability
where are the two sets of ankle joint ligaments from?
one from each malleolus
what is the function of the medial ankle ligaments?
resist over-eversion of foot