JR 101 FINAL EXAM UPDATED QUESTIONS AND ANSWERS
RATED A+
✔✔t/f: the point of origin of a muscle is a location where the muscle can move - ✔✔false
✔✔if a surgeon commented that a particular femoral condyle was "hypertrophic" the
condyle has: - ✔✔increased in size
✔✔the anterior cruciate ligament is responsible for: - ✔✔restraint to anterior tibial
translation with respect to femur
✔✔the posterior cruciate ligament is responsible for - ✔✔restraint to posterior tibial
translation with respect to femur
✔✔t/F: the two points of attachment for the medial collateral ligament are the distal
medial femoral condyle and the proximal fibular head - ✔✔false
✔✔with respect to the degrees of freedom of motion in the knee: how many are there? -
✔✔6
✔✔the arcs of flexion in the knee are: - ✔✔deep flexion, functional, screw home
✔✔the mechanical axis of the lower extremity is determined by drawing a straight line
from: - ✔✔the center of the femoral head to the center of the ankle joint
✔✔when we refer to the "functional axes" of the knee, we reference the combination of
rotations around what two axes? - ✔✔the TEA of the femur combined with the
longitudinal axis of the tibia
✔✔the flexion-extension axis closely corresponds to the insertion points of what two
ligamentous soft tissue structures in the knee joint? - ✔✔MCL and LCL
✔✔the "anatomical" or "clinical" TEA of the knee is an imaginary line that connects: -
✔✔the most prominent parts of the medial and lateral epicondyles
✔✔the "surgical" TEA is an imaginary line that connects: - ✔✔the medial epicondylar
sulcus with the prominence of the lateral epicondyle
✔✔which distal femoral condyle in the knee joint has a sulcus - ✔✔medial
✔✔Whiteside's Line is: - ✔✔perpendicular to the surgical TEA
✔✔Whitesides line is also known as - ✔✔The trochlear A/P axis
, ✔✔Where is Whitesides line drawn from? - ✔✔a line drawn from the deepest part of the
trochlear groove posteriorly to the center of the intercondylar notch
✔✔t/f: the normal human knee (not operated on) has a medial pivot - ✔✔true
✔✔during the screw home arc of motion in the knee, the tibia will internally rotate with
reference to the femur as the knee extends - ✔✔false
✔✔t/f: since the knee joint requires little assistance from the muscles as it moves
through the screw home arc of motion, the resultant motion is described as "active
motion" - ✔✔false
✔✔as the knee joint moves throughout the functional arc, the motion is controlled by
ligaments as well as muscles. this motion is categorized as being - ✔✔active
✔✔t/f: as the knee flexes throughout the functional arc of motion as we walk, and the
tibia is lifted off the ground, the femur externally rotates with reference to the tibia -
✔✔true
✔✔if one views the posterior condyles of the knee in the sagittal plane through the
functional flexion axis (TEA) the condylar appear (blank) from 10 degrees to 120
degrees - ✔✔circular
✔✔is the deep flexion arc of motion active or passive - ✔✔passive
✔✔the most important biomechanical function of the patella is to improve -
✔✔quadricep efficiency
✔✔t/f: the patella decreases the lever arm of the extensor mechanism - ✔✔false
✔✔t/f: the tibia tubercle is not part of the extensor mechanism - ✔✔false
✔✔in the human knee joint, the distance (in the sagittal plane) between the quadriceps
force in the knee joint and the flexion extension axis of the knee can be referred to as
being a: - ✔✔moment arm
✔✔t/f: triathlon CS tibial inserts are available in six thicknesses; they match the six
thicknesses option that are available for the CR tibial insert - ✔✔false
✔✔when referring to a CS tibial liner in the Triathlon knee system, the letter C-S stands
for "cruciate sacrificing" - ✔✔false
RATED A+
✔✔t/f: the point of origin of a muscle is a location where the muscle can move - ✔✔false
✔✔if a surgeon commented that a particular femoral condyle was "hypertrophic" the
condyle has: - ✔✔increased in size
✔✔the anterior cruciate ligament is responsible for: - ✔✔restraint to anterior tibial
translation with respect to femur
✔✔the posterior cruciate ligament is responsible for - ✔✔restraint to posterior tibial
translation with respect to femur
✔✔t/F: the two points of attachment for the medial collateral ligament are the distal
medial femoral condyle and the proximal fibular head - ✔✔false
✔✔with respect to the degrees of freedom of motion in the knee: how many are there? -
✔✔6
✔✔the arcs of flexion in the knee are: - ✔✔deep flexion, functional, screw home
✔✔the mechanical axis of the lower extremity is determined by drawing a straight line
from: - ✔✔the center of the femoral head to the center of the ankle joint
✔✔when we refer to the "functional axes" of the knee, we reference the combination of
rotations around what two axes? - ✔✔the TEA of the femur combined with the
longitudinal axis of the tibia
✔✔the flexion-extension axis closely corresponds to the insertion points of what two
ligamentous soft tissue structures in the knee joint? - ✔✔MCL and LCL
✔✔the "anatomical" or "clinical" TEA of the knee is an imaginary line that connects: -
✔✔the most prominent parts of the medial and lateral epicondyles
✔✔the "surgical" TEA is an imaginary line that connects: - ✔✔the medial epicondylar
sulcus with the prominence of the lateral epicondyle
✔✔which distal femoral condyle in the knee joint has a sulcus - ✔✔medial
✔✔Whiteside's Line is: - ✔✔perpendicular to the surgical TEA
✔✔Whitesides line is also known as - ✔✔The trochlear A/P axis
, ✔✔Where is Whitesides line drawn from? - ✔✔a line drawn from the deepest part of the
trochlear groove posteriorly to the center of the intercondylar notch
✔✔t/f: the normal human knee (not operated on) has a medial pivot - ✔✔true
✔✔during the screw home arc of motion in the knee, the tibia will internally rotate with
reference to the femur as the knee extends - ✔✔false
✔✔t/f: since the knee joint requires little assistance from the muscles as it moves
through the screw home arc of motion, the resultant motion is described as "active
motion" - ✔✔false
✔✔as the knee joint moves throughout the functional arc, the motion is controlled by
ligaments as well as muscles. this motion is categorized as being - ✔✔active
✔✔t/f: as the knee flexes throughout the functional arc of motion as we walk, and the
tibia is lifted off the ground, the femur externally rotates with reference to the tibia -
✔✔true
✔✔if one views the posterior condyles of the knee in the sagittal plane through the
functional flexion axis (TEA) the condylar appear (blank) from 10 degrees to 120
degrees - ✔✔circular
✔✔is the deep flexion arc of motion active or passive - ✔✔passive
✔✔the most important biomechanical function of the patella is to improve -
✔✔quadricep efficiency
✔✔t/f: the patella decreases the lever arm of the extensor mechanism - ✔✔false
✔✔t/f: the tibia tubercle is not part of the extensor mechanism - ✔✔false
✔✔in the human knee joint, the distance (in the sagittal plane) between the quadriceps
force in the knee joint and the flexion extension axis of the knee can be referred to as
being a: - ✔✔moment arm
✔✔t/f: triathlon CS tibial inserts are available in six thicknesses; they match the six
thicknesses option that are available for the CR tibial insert - ✔✔false
✔✔when referring to a CS tibial liner in the Triathlon knee system, the letter C-S stands
for "cruciate sacrificing" - ✔✔false
