ch 15 Knee Conditions

10. True or False? The lateral meniscus is a smaller and more freely moveable structure than the medial meniscus.

True

1. The menisci of the knee function to A. absorb and dissipate force B. improve the congruency of the joint C. increase knee stability D. all of the above

all the above

Function of ACL (anterior cruciate ligament)

anterior translation of tibia on femur rotation of tibia on femur hyperextension

What is a meniscus?

fibrocartilaginous discs attached to tibial plateaus both medial and lateral

What is the patellofemoral joint?

patella (kneecap) is a triangular bone that rests between femoral condyles to form this joint

function of LCL (lateral collateral ligament)

resist laterally directed (varus) forces

What is the anatomical name for the knee

tibiofemoral joint

10. True or False? The immediate management for a suspected MCL injury includes the application of ice and compression. In addition, if unable to walk without a limp, the individual should be fitted for crutches.

true

What muscles act on the knee joint?

vastus medialis muscle, quadriceps muscle, gastreocnemius muscle

1. The function of the ______ is to resist valgus and rotational forces acting on the knee. A. MCL B. LCL C. ACL D. PCL

A. MCL

1. Which of the following muscles is part of the hamstring muscle group? A. gracilis B. sartorius C. biceps femoris D. vastus lateralis

C. Biceps femoris

1. A direct blow to the lateral aspect of the knee is a common mechanism of injury for the A. ACL B. PCL C. MCL D. LCL

C.) MCL

1. Locking is a classic sign of injury to the A. patellar bursa B. joint capsule C. medial meniscus D. ACL

C.) Medial meniscus

1. A common mechanism of injury for a longitudinal tear of the meniscus is A. a shearing forces from rotational motions B. a twisting motion when the foot is fixed and the knee is flexed C. deceleration combined with a cutting motion D. hyperextension

b) a twisting motion when the foot is fixed and the knee is flexed

1. Which of the following conditions warrants activation of EMS? A. patellar dislocation B. knee dislocation C. tear of the ACL D. all of the above

b) knee dislocation

1. The anterior cruciate ligament A. resists posterior displacement of the tibia on the femur B. is the primary stabilizer of the knee C. prevents anterior displacement of the tibia on the femur D. resists varus and valgus forces to the kneeThe anterior cruciate ligament

c) prevents anterior displacement of the tibia on the femur

Describe the knee joint relative to its' stability (i.e., bony configuration, ligaments, & muscles)

ligaments- moderate muscles-strong bony configuration- minimal

function of MCL (Medial collateral ligament)

resist medially directed (valgus) forces

Function of PCL (posterior cruciate ligament)

resists posterior displacement of tibia on femur

What is the function of the patella?

-protect femur -increase effective power of quads

What is the function of the meniscus?

-stabilize joint by deepening the articulation -shock absorption

1. Deceleration combined with a cutting motion is a common mechanism of injury for the A. ACL B. PCL C. MCL D. LCL

A. ACL

10. True or False? The medial meniscus has an attachment to the medial collateral ligament and fibers from the biceps femoris muscle.

False

10. True or False? The patella improves the mechanical advantage of the quadriceps muscles to produce knee extension.

True

10. True or False? The function of the joint capsule in the knee is to deepen the joint and, in doing so, allow for a more stable articulation.

false

10. True or False? The normal Q-angle for males and females is the same.

false

10. True or False? The type of shoe worn has minimal, if any impact, on injuries sustained to the knee.

false